Home > CAAC > Chapter 8 > Lesson 8.2.2 > Problem 8-57
8-57.
The x-intercept is where y = 0.
Subtract 6 from both sides.
Divide by 2 on both sides.
y = 2x + 6
0 = 2x + 6
−6 = 2x
−3 = x
The x-intercept is (−3, 0).
The slope of a line perpendicular to another line is the negative reciprocal of the other line's slope.
Example:
Line (a): y = 4x + 7
m = 4