Prove that if the slopes of two nonvertical lines are negative reciprocals of each other, then the lines are perpendicular.

I U ev Av Ao he lines parallel perpendicular or neither katelyn miller per 1 A(-3, 13), B(4, -15), C(-2, 5), D(1, -7) Slope of AB Slope of CD Types of Lines -A(9, 2), B(-1, 8), C(-5, 16), D(-8, 11) Slope of AB Slope of CD Types of Lines 3. A(-3, 8), B(3, 2), C(7, 1), D(5, -1) Slope of AB Slope of CD Types of Lines 9. A(5, -8), B(-2, -10), C(-6, -13), D(-2, 1)

1. Determine an equation for the line that satisfies each set of conditions. a) The slope is 3 and the y-intercept is 5. b) The x-intercept is 1 and the y-intercept is 4. c) The slope is 4 and the line passes through the point (7, 3).

Find the value of A so that the slope of the line joining points P(A,6) and Q(4,4) is equal to 4.