The line graph shows the number of text messages Marco received each day from Tuesday to Friday. On which day was the number of messages Marco received the closest to the average number of messages he received from Tuesday to Friday? Ans: ___

1. Read the number of messages for each day from the graph

Tuesday: $56$
Wednesday: $32$
Thursday: $24$
Friday: $40$

2. Calculate the total number of messages received from Tuesday to Friday

$\text{Total} = 56 + 32 + 24 + 40 = 152$

3. Calculate the average number of messages

$\text{Average} = \frac{152}{4} = 38$

4. Determine which day's number of messages is closest to the average

Difference for Tuesday: $|56 - 38| = 18$
Difference for Wednesday: $|32 - 38| = 6$
Difference for Thursday: $|24 - 38| = 14$
Difference for Friday: $|40 - 38| = 2$

The smallest difference is $2$, which corresponds to Friday.