SOLUTION: find the equation of this line (0, -1), (2, -5), (4, -9)

Algebra ->  Graphs -> SOLUTION: find the equation of this line (0, -1), (2, -5), (4, -9)      Log On


   

Question 370045: find the equation of this line (0, -1), (2, -5), (4, -9)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

Use two points to determine the slope.
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
m=%28-9-%28-1%29%29%2F%284-0%29=-%288%2F4%29=-2
Now use the slope-intercept form of a line,y=mx%2Bb
y=-2x%2Bb
Use any point to solve for b.
-9=-2%284%29%2Bb
-9=-8%2Bb
b=-1
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highlight%28y=-2x-1%29
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