Question

Solve. Assume the exercise describes a linear relationship.

When making a telephone call using a calling card, a call lasting 3 minutes costs $1.05. A call lasting 12 minutes costs $2.85. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of making a call lasting x minutes.

Answer 1

2.85 - 1.05/12 - 3
1.8 / 9
m = .2
y - 1.05 = .2(x - 3)
y = .2x +.45