Question
find the average rate of change between f(-4) and f(-1) in the function f(x)= x^2+2x-8
Answers
Steve
that would be
(f(-1)-f(-4))/(-1 - -4)
= (-9-0)/3
= -3
See the graphs at
http://www.wolframalpha.com/input/?i=plot+y%3Dx%5E2%2B2x-8%2Cy%3D-3x+-+12+for+-5+%3C%3D+x+%3C%3D+0
(f(-1)-f(-4))/(-1 - -4)
= (-9-0)/3
= -3
See the graphs at
http://www.wolframalpha.com/input/?i=plot+y%3Dx%5E2%2B2x-8%2Cy%3D-3x+-+12+for+-5+%3C%3D+x+%3C%3D+0