Question

Ben had $100 in his savings account. He adds $5.00 a week to his savings as shown in the graph below. According to this graph, how much money does he have in his savings account after 8 weeks?

A. $40
B. $135
C. $140
D. $145

Answer 1

Option (C)

Explanation:

Let the relation between amount of money (m) and Time (t) is represented by the equation,

m = ct + b

Where c = Investment per week

b = Ben already had the amount before investment

From the question,

c = $5 per week

b = $100

Therefore, equation will be,

m = 5t + 100

If duration of the investment 't' = 8 weeks

Amount in the account after 8 weeks,

m = 5(8) + 100

m = $140

Option (C) is the correct option.