Write the equations of two lines whose graphs are perpendicular to one another

Write 2 equations in slope - intercept form: y = mx + b

The slopes of perpendicular lines are negative reciprocal of each other. That is, if you have a slope of 2/3, the perpendicular slope will be - 3/2.

y = 2/3x + 3

is perpendicular to

y = - 3/2x - 9

Only the slope matters in the equations. The y-intercept can be anything. I randomly chose + 3 and - 9.