Question

Given: f(x) = 8-4x

A. Find f(-2)

f(2) = 8-4(-2)

B. Find x, when f(x) = 8

8-4x = 8

C. Graph the function.

( a graph that has 20X and 20Y as the max numbers)

D. State the domain and range of the function.

(confused on what to do here)

E. Use the graph to find x, when . Show details on the graph.


F. Use the graph to find when x = 3. Show details on the graph.

Answer 1

Given: f(x) = 8-4x

A. Find f(-2)

f(-2) = 8-4(-2) = 8+8 = 16
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B. Find x, when f(x) = 8

8-4x = 8
so
-4x = 0
x = 0/-4
x = 0
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I can not very well graph for you. It is a straight line
y = -4 x + 8
when x = 0, y = 8
when y = 0 x = 2
your line goes through those two points