Intermediate Algebra (6th Edition)

Because the equations in 43-46 are all expressed in slope-intercept form ($y=mx+b$) and all have the same slope ($m$ value), the easiest way to match the graphs to their equations is by using the $y$ intercept ($b$ value). The equation $f(x)= 3x -2$ has a $b$ value of $-2$, so it matches to the line in graph A, which crosses the y axis at (0, -2).