Question

What is the average rate of change for f(x)=x^2 9x=18 from x= -10 to x=10

Answer 1

Hello,

I suppose you keyboard is french shift "=" ===>"+"

f(x)=x²+9x+18
f(10)=100+90+18=198
f(-10)=100-90+18=28

rate=(198-28)/(10-(-10))=170/20=17/2