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.
To find out how many sit-ups Marla will do on Day 12, we first need to determine the pattern of increase in the number of sit-ups over the days provided.
From Day 1 to Day 2, there is an increase of 4 sit-ups.
From Day 2 to Day 3, there is also an increase of 4 sit-ups.
From Day 3 to Day 4, there is again an increase of 4 sit-ups.
Therefore, we can see that there is a constant increase of 4 sit-ups each day.
To find out how many sit-ups Marla will do on Day 12, we can calculate the total increase in sit-ups from Day 1 to Day 12.
Total increase = 4 sit-ups/day * 11 days (from Day 2 to Day 12, as we are already given the sit-ups for Day 1) = 44 sit-ups.
Now, we add this total increase to the number of sit-ups on Day 1:
Sit-ups on Day 12 = 17 sit-ups (Day 1) + 44 sit-ups = 61 sit-ups.
Therefore, Marla will do 61 sit-ups on Day 12.