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f(-1) = -.25
f(1) = -.50
Avg rate of change =
[ f(1) - f (-1) ]
___________ =
1 - (-1)
[ -.50 - (-.25) ]
____________ =
2
-.25
_____ =
-.125
how did you get this
Look at the graph....when x = - 1, then y = -1/4 = -.25
So f(x) =f (-1) = -.25
Similarly.....when x = 1, then y = -1/2 = -.50
So ...f(1) = -.50
