Plans for a bridge are drawn on a coordinate grid. one girder of the bridge lies on the line y = 3x – 3. a perpendicular brace passes through the point (–7, 9). write an equation of the line that contains the brace.

Using the slope intercept formula, we conclude that the slope of line p:y=3x-3 is 3.Since line k is perpendicular to line p it must have a slope that is the negative reciprocal.Therefore the slope of line k is -1/3.Using the formula y-9=-1/3(x-(-7)) and doing the math we will end up with k:y=-1/3x+34/3