finding where function is positive from its graph

[bryanres]

Based on the graph of the function f above, what are the values of x for which f(x) is positive?

-2 x < 1 or 8 < x 10

-2 x < 1 or 4 < x < 8

1 < x < 4 or 8 < x 10

-2 x 10

1 < x < 8

 

[Guest]

1<x<4 and x>8 --------> f(x)>0 (positive)

 

[stapel]

Why are you having difficulty? They've given you a neatly-labelled graph and asked where the line is above the x-axis. Just look at the graph and copy down the intervals.

Eliz.