Since the line is raising the slope is positive.
\Next, find the slope.
\Substitute –13 for y2, –3 for y1, 1 for x2, and 6 for x1 in slope formula.
\ (Product of two same signs is positive)
(Subtract:
)
(Add:
)
(Cancel common signs)
(Divide:
)
Slope is positive and slope is .