SOLUTION: a line through (-2,y) and (2,-10) is perpendicular to a line through (-3,-7) and (5,-5). FIND Y

Question 1165023: a line through (-2,y) and (2,-10) is perpendicular to a line through (-3,-7) and (5,-5). FIND Y
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Calculate the slope of the line through

and

using the slope formula.

Then derive an expression in

that represents the slope of the line through

and

using the same slope formula.

Find the negative reciprocal of either of the slopes. Since the slopes of perpendicular lines are negative reciprocal of each other, set one slope equal to the negative reciprocal of the other and then solve the resulting equation for

John

My calculator said it, I believe it, that settles it

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