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How do I solve this Algebra 1 Question?
Need help solving this: Write the equation of the line in standard form that passes through (5,-2) and has a slope of -3
10 Answers
- Anonymous1 decade agoFavorite Answer
y - y1 = m (x - x1)
y - (-2) = -3 (x - 5)
y + 2 = -3x + 5
3x + y = 3
Source(s): * - Mr. KurtzLv 61 decade ago
Step 1: Your equation will ultimately take the form of Ax +By = C
Starting with y - y1 = m(x - x1) where x = 5, y = -2 and m = -3 yields:
y - (-2) = -3(x-5)
y + 2 = -3x + 15 which simplifies to y = -3x + 13.
Rewriting by adding -3x to both sides of equation yields:
3x + y = 13 which is now in Standard Form
Hope this helps
- RandyLv 51 decade ago
Recall that lines have an equation of the form y = mx + c, where m is the slope. Substituting the value of m, we get:
y = -3x + c
To find the value of c, we substitute the coordinates of the given point.
-2 = -3(5) + c
c = 13
So, the equation of the line is y = -3x + 13
Hope this helps.
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- 1 decade ago
At point (5,-2),
-2=-3*5+C
therfore, C=15-2=13
Hence general formular for line is
y=-3x+13
- 1 decade ago
(5,-2) Slope -3
y - y1 = m(x - x1)
y - (-2) = -3(x - 5)
y + 2 = -3x + 15
y = -3x + 15 - 2
y = -3x + 13