Posted by confusedPlease help!!!! on .
find the rate of change of f(x)=x^2+4
a. from 2 to 0
b. from 1 to 3
c. from 2 to 1
please show work

calculuscan someone please help me with this ques 
Reiny,
I will do the last one, you do the first two in the same way ...
f(2) = (2)^2 + 4 = 8
f(1) = 1 + 4 = 5
rate of change = ( f(x2  f(x1))/(y2  y1)
= (58)/(1(2)) = 3/3 = 1
(notice I could have done:
(85)/(2  1) = 3/3 = 1 to get the same result )