15) through: (-3, 1), parallel to $y = -\frac{5}{3}x + 5$
16) through: (-5, 5), parallel to $y = -\frac{1}{2}x - 1$
17) through: (-5, -5), perp. to $y = -\frac{3}{5}x$
18) through: (4, -3), perp. to $y = \frac{1}{2}x - 5$
19) through: (-1, 5), perp. to $y = \frac{1}{4}x - 4$
20) through: (-3, -5), perp. to $y = -\frac{1}{2}x + 4$
21) through: (-1, -5), perp. to $y = \frac{4}{9}x - 3$
22) through: (-5, -4), perp. to $y = \frac{3}{4}x + 5$
23) through: (5, 4), perp. to $x = 0$
24) through: (5, -3), perp. to $y = \frac{5}{8}x + 2$
Write the slope-intercept form of the equation of the line through the given points.
25) through: (-2, -3) and (-1, 1)
26) through: (0, -1) and (-2, 2)
27) through: (-4, 3) and (3, -1)
28) through: (-5, -4) and (0, 5)
29) through: (2, 1) and (0, -4)
30) through: (0, -2) and (-4, -3)