Question

Evaluate each piecewise function for x  8 and x  5.
1. f(x)
{2x if x<0
0 if x>0

Answer 1

Hint:

f(x) = 2x if x < 0

or

f(x) = 0 if x > 0

Answer 2

Is that supposed to say x = 8 and x = 5?

Answer 3

yes it is suppose to say x=-8 and x=5

Answer 4

Rule 1: Your function says for all x values less than 0, the y value is 2 times the x value.
Rule 2: Your function says for all x values greater than 0, the y value is 0.
Those are the two rules of your function.
Now the problem says to find the y value when x = 8. So you have to figure out which rule to use. Is 8 less than 0 or greater than 0. Which rule should you use?