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anonymous

  • 5 years ago

3.7 points Save If the graph of a line has a positive slope and a negative y-intercept, what happens to the x-intercept if the slope and the y-intercept are doubled?

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  1. anonymous
    • 5 years ago
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    Y = mx + b is the slope-intercept form of the equation of a line m = slope b = y intercept so graph something simple such as y = 2x-2. Then double the slope (m, which is 2 in this case) and intercept (-2 in this case) to get y = 2x-2 --> y = 4x-4. Both slope and intercept are doubled, but as you can see it crosses the x-intercept (where y = 0) at the same point as y = 2x-2. The x intercept is not changed. as long as m = b, the x-intercept will always be the same.

  2. anonymous
    • 5 years ago
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    YOU ARE SO WONDERFUL, thanks so much darling (: i really appreciate it (: <3

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