Algebra
posted by Catherine .
The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line With slope of —0.4. See the figure below. Suppose that the height of the candle after 11 hours is 22.6 centimeters. What was the height of the candle after 2 hours?

the slope means that the candle shortens by .4 cm per hour of burning
how much taller would it be nine hours earlier? (how much did it shrink in nine hours?)