What is the equation of a line that contains the following two points?
20 points

(3,-1) , (4,4)

a) y = -5x + 8

b) y = 3x + 5

c) y = 5x -16

d) y = -3x + 6

Answer this question only if you know the 30 points and

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.