Question

The graph of a function f is shown below.
Find one value of x for which f(x)=-1 and find f(1).

Answer 1

`Find one value of x for which f(x)=-1`

step 1) draw a horizontal straight line through -1 on the y axis. Extend this line out as far as it can go in both direction

step 2) mark the points where this horizontal line crosses the curve. In this case, it will cross at 2 points

step 3) write down the coordinates of each point found in step 2

step 4) focus solely on the x coordinates of each point. The teacher only wants you to report one x coordinate, so you can pick either one.

Answer 2

but if it's on the y-axis it would only cross over at one point? @jim_thompson5910

Answer 3

draw a horizontal line through -1 on the y axis

so here is -1 on the y axis

Answer 4

and here is the horizontal line going through -1 on the y axis