Question

Recall that the slope of a non-vertical line is a measure of the number of units the line rises (or falls) vertically for each unit of horizontal change from left to right. Thus, the slope of a line passing through
P(−2, 4)
and
Q(x, f(x))
is given by
Slope = m =
f(x) − 4
x + 2

=


− 4
x + 2

=
(x + 2)

x + 2

=

, x ≠ −2.