How do you find the average rate of change of y= -3(x-4)^2+3 over interval [-4,9]? Algebra Graphs of Linear Equations and Functions Slope 1 Answer Edric Y. Nov 5, 2015 9 Explanation: average rate of change : (f(b)-f(a))/(b-a) b = 9 a=-4 ((-3(9-4)^2+3)-(-3(-4-4)^2+3))/(9-(-4)) ((-3(5)^2+3)-(-3(-8)^2+3))/(13) ((-3(25)+3)-(-3(64)+3))/(13) ((-72)-(-189))/(13) 9 Answer link Related questions What is Slope? How can slope be undefined? How do you calculate slope from a graph? How do you calculate the slope given two points? How does a positive slope differ from a negative slope? How does change in the slope affect the steepness of a line? Why is the slope of a horizontal line is zero? How do you determine the slope of (3, –5) and (–2, 9)? How do you determine the slope of (1/3, 3/4) and (–2, 6)? How do you determine the slope of (2,7) and (7,2)? See all questions in Slope Impact of this question 1712 views around the world You can reuse this answer Creative Commons License