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Math: Pre Cal

posted by on .

f(x) =
{−8 if −3 ≤ x ≤ 0
{x if 0 < x ≤ 3

Evaluate the given expressions.
a)f(-1)=
b)f(0)=
(^Teach how to do this.)

What is the formula?
a)(−8)*(x > −3)*(x >= 0) + (x)*(x <= 0)*(x > 3)
b)(−8)*(x >= −3)*(x <= 0) + (x)*(x > 0)*(x <= 3)
c) (−8)*(x <= 0) + (x)*(x <= 3)
d)(−8)*(x >= −3) + (x)*(x > 0)

Thank You.

  • Math: Pre Cal - ,

    a. You have to be kidding. is -1 in the region -3 to 0? If so, f(-1)=-8
    Now, which region is x=0 in?

    b. second question on formula. All that makes no sense to me.

  • Math: Pre Cal - ,

    I like answer B

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