Question

Mary decides to get phone service from T-Mobile. T-Mobile offers her a plan where she will have to pay $40 per month with a $35 activation fee. What’s her equation using y=mx+b

Answer 1

y=40x+35

Explanation:

After 0 months, she still needs to pay the first $35. This means that this is her y-intercept, and in the formula “y=mx+b”, it would go in the “b” place. Then x would mean how many months have passed, so therefore 40 would go into the “m” place. If you put that together, it looks like “y=40x+35”.