Answer: 200
Step-by-step explanation:
A y-intercept happens when x is 0. In this case, x represents the number of months, so we want to know how many stamps Carly has before starting. You can see that there is a pattern: every month, the number of stamps increases by 50.
For example, from month 1-3 (2 months), it increased 100, meaning it increased 50 per month
Now that we have that information, we have to go backwards.
At 1 month, it was 250, so at 0 months (where x = 0) it has to be 250-50, which equals 200.
Therefore, the answer is 200.
Hope this helps! :)
