SOLUTION: Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 12 hours of burning, a candle has a height of

Algebra ->  Linear-equations -> SOLUTION: Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 12 hours of burning, a candle has a height of       Log On


   

Question 1139488: Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 12 hours of burning, a candle has a height of 19.6 centimeters. After 25 hours of burning, its height is 17 centimeters. What is the height of the candle after 15 hours?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
(12, 19.6) and (25, 17);

y-17=%28%2817-19.6%29%2F%2825-12%29%29%28x-25%29
y-17=-0.2%28x-25%29
y=-0.2x%2B5%2B17
highlight%28y=-0.2x%2B23%29------equation you want


Fifteen Hours?
Let x=15, and evaluate y.