SOLUTION: Passing through (-4,-1) and (3,4)

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Question 106057: Passing through (-4,-1) and (3,4)

Found 2 solutions by MathLover1, tutorcecilia:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
Passing through (-4,-1) and (3,4)
means:
x1+=+-4
x2+=+3
y1+=+-1
y2+=+4



Solved by pluggable solver: FIND EQUATION of straight line given 2 points
hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-4, -1) and (x2, y2) = (3, 4).
Slope a is .
Intercept is found from equation a%2Ax%5B1%5D%2Bb+=+y%5B1%5D, or 0.714285714285714%2A-4+%2Bb+=+1.85714285714286. From that,
intercept b is b=y%5B1%5D-a%2Ax%5B1%5D, or b=-1-0.714285714285714%2A-4+=+1.85714285714286.

y=(0.714285714285714)x + (1.85714285714286)

Your graph:




Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
First, find the slope of the line:
Slope = m = %28%28-1-4%29%2F%28-4-3%29%29=%28-5%2F-7%29=%285%2F7%29
.
Next, use the slope-intercept form of a line: y=mx+b
(x, y ) = (-4, -1)
m = (5/7)
Plug-in the values:
y=mx+b
-1=(5/7)(-4)+b and solve for the b-term
-1=(-20/7)+b
-1+(20/7)=b
13/7=b
.
So,
y=(5/7)x + 13/7