SOLUTION: A 20-ounce drink costs $1.20. A 32-ounce drink costs $1.60. Assuming a linear relationship between size and cost, which of the following gives the cost C of a drink with x ounces?

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: A 20-ounce drink costs $1.20. A 32-ounce drink costs $1.60. Assuming a linear relationship between size and cost, which of the following gives the cost C of a drink with x ounces?       Log On

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Question 1095511: A 20-ounce drink costs $1.20. A 32-ounce drink costs $1.60. Assuming a linear relationship between size and cost, which of the following gives the cost C of a drink with x ounces?
A. C = 1/15x + 8/15
B. C = 1/30x + 1/3
C. C = 1/15x + 1/3
D. C = 1/30x + 8/15
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
(x,y), x for amount of drink and y for cost

(20, 1.2) and (32, 1.6) points

m=%281.6-1.2%29%2F%2832-20%29=0.4%2F12=4%2F120=2%2F60=1%2F30

In point-slope form, y-1.2=%281%2F30%29%28x-20%29-----do what you need from this.