College Algebra, 2013a

186 Linear and Quadratic Functions
|x +4|
28. f(x) =
x +4
No zeros
No x-intercept
y-intercept (0, 1)
Domain (−∞, −4) ∪ (−4, ∞)
Range {−1, 1}
Constant on (−∞, −4)
Constant on (−4, ∞)
Absolute minimum at every point (x, −1)
|2 − x|
29. f(x) =
2 − x
No zeros
No x-intercept
y-intercept (0, 1)
Domain (−∞, 2) ∪ (2, ∞)
Range {−1, 1}
Constant on (−∞, 2)
Constant on (2, ∞)
Absolute minimum at every point (x, −1)
30. Re-write { f(x) =x + |x|−3as
−3 if x2
Absolute maximum at every point (x, 1)
where x