The height of a candle, f(x), in inches, is a linear function of the number of hours the
candle has been burning, x. Each change
of 4 in x results in a change of -5 in f(x).
What is the rate of change in the candle's
height in inches per hour?

help pls :))

Pls , the question is in the picture!

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Find the value of ax 4 ; a = 2, x = 1. select one: a. 2 b. 4 c. 1 d. 8