College Algebra & Trigonometry, 2018a

206 CHAPTER 4. FUNCTIONS
So the graph would look like this:
8
6
4
2
−8 −6 −4 −2
−2
2 4 6 8
−4
−6
−8
On the other hand, if we negate the x-variable (f(−x)), then the function values
previously associated with the positive values of x would be associated with the
negative values of x and vice versa. This would reflect the function over the
y-axis.
If we again consider our original function and a table of values:
8
6
4
2
−8 −6 −4 −2
−2
2 4 6 8
−4
−6
−8