Question

Answer the question correctly
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

Day 1 Day 2 Day 3 Day 4 Day 5
17 21 25 29 33
The table shows how the number of sit-ups Marla does each day has changed over time. At this rate, how many sit-ups will she do on Day 12? Explain your steps in solving this problem

Answer 1

To find out how many sit-ups Marla will do on Day 12, we need to first determine the pattern of increase in the number of sit-ups.

From Day 1 to Day 2, there is an increase of 4 sit-ups.
From Day 2 to Day 3, there is an increase of 4 sit-ups.
From Day 3 to Day 4, there is an increase of 4 sit-ups.
From Day 4 to Day 5, there is an increase of 4 sit-ups.

Since the number of sit-ups increases by 4 each day, we can calculate the number of sit-ups on Day 12 by adding 4 sit-ups for each day:

Number of sit-ups on Day 1 = 17
Increment (4 sit-ups) x 11 days = 44 sit-ups

Calculation: 17 (Day 1) + 44 = 61

Therefore, Marla will do 61 sit-ups on Day 12.