1992 AHSME Problems/Problem 12
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Problem
Let be the image when the line is reflected across the -axis. The value of is
Solution
First we want to put this is slope-intercept form, so we get . When we reflect a line across the x-axis, the line's x-intercept stays the same, while the y-intercept and the slope are additive inverses of the original line. Since is the sum of the slope and the y-intercept, we get .
See also
1992 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 11 |
Followed by Problem 13 | |
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