A candle is 17 in. tall after burning for 3 hours. After 5 hours, it is 15 in. tall. Write a linear equation to model the relationship between height h of the candle and time t. Predict how tall the candle will be after burning 8 hours.

Answer 1

since it burned 2 inches in 2 hours,
it burned 1 inch per hour.

SO, it must have burned 3 inches in the first 3 hours

h(t) = 20 - t

Answer 2

12 inches tall