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Home > CAAC > Chapter 7 > Lesson 7.3.4 > Problem 7-114

7-114.

Substitute the slope and the points into the point slope formula.

yk = m(xh)

Substitute the slope (0 for a horizontal line) and the points into the point slope formula.

y + 11 = 0(x − 8)
yk = m(xh)
y + 11 = 0
y = −11

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