### Home > AC > Chapter 7 > Lesson 7.3.4 > Problem 7-114

7-114.

Find the equation of each line below.

The line with slope

that goes through the point. Using

, substitute the values ofandand solve for.Solve for

and rewrite the equation substitutingandback into their original positions.A horizontal line that goes through the point

. A horizontal line has zero slope. Therefore, simply substitute the values for

andinto the equation and solve for.

Then, rewrite the equation withandsubstituted back into their original equations.The line perpendicular to the line in part (a) above but going through the origin.

See parts (a) and (b) to solve. Remember that perpendicular lines have opposite reciprocal slopes.