Write the slope-intercept form of the equation of 3 15) through: (4,-1), parallel to y=-x 4 16) through: (4, 5), parallel to y=-x-4 17) through: (-2,-5), parallel to y=x+3 18) through: (4.-4), parallel to y=3 3 3 19) through: (-3,-3), perp. to y=---2 20) through: (0,-4), perp. to y=x+1 2 8 21) through: (1,-3), perp. to y=-x 22) through: (2, 4), perp. to y=-x+5