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Question 85839This question is from textbook Algebra structure and method
: I,m supposed to write an equation for the line with slope 3 going through points (1,-2). I'm not sure how you would do that.
This question is from textbook Algebra structure and method
Answer by Earlsdon(6294)   (Show Source):
You can put this solution on YOUR website! You can start with the slope-intercept form for a linear equation: y = mx + b where m is the slope and b is the y-intercept.
You are given the slope, m = 3, so you can write:
1) y = 3x+b
Now you need to find the value of b, the y-intercept.
You can do this by substituting the x- and y-coordinates of the given point (1, -2) into equation 1) and solving for b.
2) -2 = 3(1)+b Subtract 3 from both sides.
-5 = b
Now you can write the final equation:
y = 3x-5
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