The table shows the proof of the relationship between the slopes of two perpendicular lines. What is the missing statement in step 5?

What point is the projection of q on a) r b) s c) t

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.