Math topic中文

Graphs linear

graphs of linear functions

Practice questions

  1. 1若一次函数y=2x+b的图象不经过第二象限,则b的取值范围为b___0.
  2. 2正比例函数y=2x的图象经过点( ) A. (0,1) B. (0,0) C. (2,1) D. (1,3)
  3. 3函数y=kx+b交x轴于(2,0),若其图象过二、四象限,则此函数关系式可以是 .
  4. 4如果一次函数y=kx+1(ky=kx+1(k是常数,k≠0)k\neq 0)的图象过点(−1,0)(-1 , 0),那么yy的值随xx的增大而___((填“增大”或“减小”)).
  5. 5The variables x and y are connected by the equation y=2x3−21x2+54xy = 2x^3 - 21x^2 + 54x. Some corresponding values of x and y are g…
  6. 6Complete the table of values for y=x−4x2y = x - \frac{4}{x^2}. Values are given to one decimal place where appropriate. Compl…
  7. 7The diagram shows a circle C1C_1 with centre P(5,3)P(5, 3). The circle touches the x-axis, the tangent OQ and another line Q…
  8. 8已知一次函数y=kx+b(k,by=kx+b(k,b为常数))的图象经过平面直角坐标系的第一、二、三象限,则下列结论一定正确的是()(\quad) A. kb>0kb>0 B. kb<0kb< 0 C. k−b>0k-b>0 D. k+b<0k+b< 0…
  9. 9一次函数y=x+1不经过的象限是( ) A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限
  10. 10The variables x and y are connected by the equation y=x+5x2−3y = x + \frac{5}{x^2} - 3 Some corresponding values of x and y are…
  11. 11The variables x and y are connected by the equation y=x35−2x+1y = \frac{x^3}{5} - 2x + 1. Some corresponding values of x and y a…
  12. 12The table shows some values for y=310x3−x+1y = \frac{3}{10}x^3 - x + 1 for −3≤x≤3-3 \le x \le 3. | x | -3 | -2 | -1 | 0 | 1 | 2 | 3 |…
  13. 13Complete the table of values for y=2x+20x−15y = 2x + \dfrac{20}{x} - 15. | x | 1 | 2.5 | 5 | 10 | 12.5 | 15 | 20 | |---|---|---|-…
  14. 14一次函数y=2x-6的图象与x轴的交点坐标是 .
  15. 15The variables x and y are connected by the equation y=x35−2x+2y=\frac{x^3}{5}-2x+2. Some corresponding values of x and y are giv…
  16. 16已知函数y=x−2y=x-2,则当x=3x=3时,y=y= ___ ,其图象与xx轴的交点坐标为 ___ .
  17. 17某一次函数的图象经过点(1,2)(1,2),且yy随xx的增大而减小,则这个函数的表达式可能是 A. y=2x+4y=2x+4 B. y=3x−1y=3x-1 C. y=−3x+1y=-3x+1 D. y=−2x+4y=-2x+4
  18. 18y=x34−2x+3y = \dfrac{x^3}{4} - 2x + 3. Complete the table of values for y=x34−2x+3y = \dfrac{x^3}{4} - 2x + 3. On the grid opposite, dra…
  19. 19The table below is for the function y=x34−2x+1y = \dfrac{x^{3}}{4} - 2x + 1. Complete the table of values for y=x34−2x+1y = \dfrac{x^{3}}{4} - 2x + 1…
  20. 20若点(m,n)(m,n)在函数y=2x−6y=2x-6的图象上,则2m−n2m-n的值是()(\quad) A. 22 B. −2-2 C. 66 D. −1-1
  21. 21已知直线y=2x-3. (1)求直线与y轴的交点到x轴的距离; (2)在直线上是否存在点A,使点A到x轴的距离为2?若存在,求出点A的坐标;若不存在,请说明理由.
  22. 22一次函数y=2x−5y=2x-5的图象不经过的象限是()(\quad) A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限
  23. 23The number of bacteria in a colony doubles every hour. The colony starts with: 50 bacteria. The table below shows the nu…
  24. 24Complete the table of values for y=2x2−2x.Valuesaregiventoonedecimalplacewhereappropriate.Onthegridopposite,drawthegraphofy=\dfrac{2}{x^{2}}-2x. Values are given to one decimal place where appropriate. On the grid opposite, draw the graph of …
  25. 25Answer the whole of this question on a piece of graph paper. The variables x and y are related by the equation y=x3−3x2+1y = x^3 - 3x^2 + 1…
  26. 26The table of values for y=x+5x−7y = x + \dfrac{5}{x} - 7 is given below. | x | 0.5 | 1 | 1.5 | 2 | 3 | 4 | 5 | 6 | 7 | |---|--…
  27. 27直线y=3x+by=3x+b与yy轴交点(0,−2)(0,-2),则这条直线不经过第 ___ 象限.
  28. 28已知一次函数y=kx+b(k≠0)y=kx+b(k≠0)经过(2,−1)(2,-1)、(−3,4)(-3,4)两点,则它的图象不经过()(\quad) A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限
  29. 29Sketch the graph of y=2ln⁡xy = 2\ln x. In order to solve the equation xe2x=13xx e^{2x} = \dfrac{1}{3x}, a suitable straight line ha…
  30. 30直线y=x+3与y轴的交点坐标是 .
  31. 31直线y=-3x-3与x轴的交点坐标是 ,则不等式-3x+9>12的解集是 .
  32. 32The variables x and y are connected by the equation y=13x(11−x2).Somecorrespondingvaluesofxandy,correctto1decimalplaces,aregiveninthefollowingtable.Calculatethevalueofp.Answerp=...Onthegridopposite,drawthegraphofy = \frac{1}{3}x(11 - x^2). Some corresponding values of x and y, correct to 1 decimal places, are given in the following table. Calculate the value of p. Answer p = ... On the grid opposite, draw the graph of …
  33. 33已知一次函数y=x+b的图象经过第一、二、三象限,则b的值可以是( ) A. -1 B. 0 C. 2 D. 任意实数
  34. 34若kb<0kb < 0,则直线y=kx+by=kx+b一定通过()() A. 第一、二象限 B. 第二、三象限 C. 第三、四象限 D. 第四、一象限
  35. 35已知直线ℓ不经过第三象限,则其函数关系式可以为 .(写出一个即可).
  36. 36把直线y=−23xy=-\dfrac{2}{3}x向下平移___个单位得到直线y=−23x−2.y=-\dfrac{2}{3}x-2.
  37. 37下列各点在函数y=2x的图象上的是( ) A. (2,-1) B. (-1,2) C. (1,2) D. (2,1)
  38. 38将直线y=3x沿y轴向下平移3个单位后的直线所对应的函数解析式是 .
  39. 39Let y=2x3−x2−10xy = 2x^3 - x^2 - 10x. Complete the table of values for y=2x3−x2−10xy = 2x^3 - x^2 - 10x. On the grid opposite, draw the grap…
  40. 40下列哪些点在一次函数y=2x-3的图象上? (2,3),(2,1),(0,3),(3,0).
  41. 41已知二次函数y1=ax2+bx+c(b≠c){{y}_{1}}=a{{x}^{2}}+bx+c(b\ne c)图象的最高点坐标为(−2,4)(-2,4),则一次函数y2=(b−c)x+b2−4ac{{y}_{2}}=(b-c)x+{{b}^{2}}-4ac图象可能在: A. 一、二、三象限…
  42. 42若点(1,m)和点(n,2)都在直线y=x﹣1上,则m+n的值为
  43. 43The variables x and y are connected by the equation y=2x+6x−7y = 2x + \dfrac{6}{x} - 7. Some corresponding values of x and y ar…
  44. 44一次函数y=2x-1在y轴上的截距b= ,它与y轴的交点坐标是 .
  45. 45The variables x and y are connected by the equation y=32x+5x−7y = \frac{3}{2}x + \frac{5}{x} - 7. Some corresponding values of x…
  46. 46一次函数y=−3x+6y=-3x+6的图象与xx轴交点坐标是 ___ ,与yy轴交点坐标是 ___ ,图象与坐标轴所围成的三角形面积是 ___ .
  47. 47Let y=9x3+5x2−3x+1y = 9x^3 + 5x^2 - 3x + 1. Complete the table for y=9x3+5x2−3x+1y = 9x^3 + 5x^2 - 3x + 1. Give your answer correct to 1 decimal…
  48. 48The variables x and y are connected by the equation y=x3−3x+1y = x^3 - 3x + 1. Some corresponding values of x and y are given i…
  49. 49直线y=−2x−6y=-2x-6与两坐标轴围成的三角形的面积为 ___ .
  50. 50The diagram shows the speed-time graph for a cyclist's journey for a period of 90 seconds. The cyclist accelerates at 0.25 m/s20.25\ \mathrm{m/s}^2…
  51. 51直线y=2x+1经过点(0,a),则a= .
  52. 52若点A(2,4)在函数y=kx-2的图象上,则下列各点也在此函数图象上的是( ) A. (0,-2) B. (1.5,0) C. (8,20) D. (0.5,0.5)
  53. 53函数y=x−1y=x-1的图象不经过()(\quad) A. 第三象限 B. 第一象限 C. 第四象限 D. 第二象限
  54. 54将直线y=2x-4向右平移3个单位后,所得直线的表达式是( ) A. y=2x-1 B. y=2x-7 C. y=2x-10 D. y=2x+2
  55. 55一次函数y=−3x+5y=-3x+5的图象不经过的象限是()() A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限
  56. 56请你写出一条不经过第三象限的直线的解析式 .
  57. 57Complete the table of values for y=10−x22−4xy = 10 - \frac{x^2}{2} - \frac{4}{x}. Complete the table of values for y=10−x22−4xy = 10 - \frac{x^2}{2} - \frac{4}{x}…
  58. 58The table shows experimental values of two variables, x and y, which are connected by an equation of the form ynxk=10y^{n} x^{k} = 10…
  59. 59Complete the table of values for y=2x+9x−11y = 2x + \dfrac{9}{x} - 11. Values are given to 1 decimal place where appropriate. |…
  60. 60The table shows some values for y=4−2x−5xy = 4 - 2x - \dfrac{5}{x} for 0.5≤x≤5.50.5 \le x \le 5.5. Find the value of pp, correct to o…