What are the domain and range of f(x) = 2|x - 4|?
domain: x < 2; range: (-0,0)
domain: (-0,0); range: f(x) > 0
domain: (-0,0); range: f(x) < 0
domain: x >2; range: (-0,0)

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)