2007-08-29 19:41:15 · 3 answers · asked by jen b 1 in Science & Mathematics ➔ Mathematics
Slope formula
m = y₂- y₁/ x₂- x₁
Ordered pair
(4, - 7)(9, 3)
m = 3 - (- 7) / 9 - 4
m = 3 + 7 / 5
m = 10 / 7
m = 2
Slope is 2
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Slope intercept form
y = mx + b
Ordered pair
(4, - 7)
- 7 = 2(4) + b
- 7 = 8 + b
Transpose 8
- 7 - 8 = 8 + b - 8
collect like terms
- 15 = b
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The equation
y = 2x - 15
Transpose 2x
- 2x + y = 2x - 15 - 2x
- 2x + y = - 15
Transpose 15
- 2x + y + 15 = - 15 + 15
- 2x + y + 15 = 0
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2007-08-29 21:09:00 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
y=2x-15
2007-08-29 19:52:46 · answer #2 · answered by Stephanie 2 · 0⤊ 0⤋
i believe it is y=2x-13 but i just did that in my head (however, i did answer timidly :)
2007-08-29 19:52:29 · answer #3 · answered by Elli 2 · 0⤊ 0⤋