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
is given by
Slope = m =
f(x) − 4
x − 2
For the slope equation, I think you mean f(x)=-4x-2. All this is saying is that you can plug any number into the equation given to find any point, “Q.” When it says Q(x,f(x)), f(x) actually means the variable y on the Cartesian plane. Pick a value for x and use that as your x coordinate for point “Q” and then plug x into the equation to get coordinate y.
This should give you a second point to graph. or the -2 in the equation also happens when the x coordinate =0. so you could use (0,-2) as a second graphing point…