Question

why would you use the points (3,-4) and (-1,-8) to determine the average rate of change of the function g(x)=-x²+3x-4 on the interval -1≤x≤3

Answer 1

what is the value of g(-1)? and of g(3)?

(-1, g(-1)) and (3,g(3)) are the endpoints

Answer 2

\[avg=\frac{g(3)-g(-1)}{3-1}\]
its just the slope formula

Answer 3

when i do g(3) i get -7 ? :S

Answer 4

wait nvm

Answer 5

adding and multiplying .... the bane of math :)

Answer 6

i keep making careless mistakes today :(

Answer 7

thanks for the help @amistre64

Answer 8

this time i go g(3)=-4 and g(-1)=-8

Answer 9

got*

Answer 10

youre welcome, and we all keep making careless mistakes ... its just the way the pencil pushes