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anonymous
 5 years ago
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.
Choose one answer.
a. y = 0.2x + 1.65
b. y = 0.2x  9.15
c. y = 0.2x + 0.45
d. y = 5x  279/20
anonymous
 5 years ago
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. Choose one answer. a. y = 0.2x + 1.65 b. y = 0.2x  9.15 c. y = 0.2x + 0.45 d. y = 5x  279/20

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dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.1given 2 points: (3,1.05) and (12,2.85) the slope is: m = (2.851.05)/(123) = 1.8/9 = .2 y1.05 = .2(x3) y = .2x +.45
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