Question

Chris has $100 in his savings account and he adds $20 a month to the account. The total amount can be represented by the linear function T = 20x + 100. His goal is to have a total of $300 in four more months. What should he change in the function to reach this goal?

Answer 1

He must add 50 $ a month to reach his goal

1 month 100+50=150 $
2 month 100+2*50=200 $
3 month 100+3*50=250 $
4 month 100+4*50=300 $