SOLUTION: Write the point slope form of the equation of the line with a slope of - 2 and an x-intercept of -1.

Algebra ->  Linear-equations -> SOLUTION: Write the point slope form of the equation of the line with a slope of - 2 and an x-intercept of -1.      Log On


   

Question 1062151: Write the point slope form of the equation of the line with a slope of - 2 and an x-intercept of -1.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The point-slope form is:
+y+=+m%2Ax+%2B+b+ where
+m+ is the slope
+b+ is the y-intercept
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given:
+m+=+-2+
So far I have:
+y+=+-2x+%2B+b+
----------------------
The x-intercept occurs where +y+=+0+,
so you are given the point ( -1,0 )
Plug this point into the equation:
+y+=+-2x+%2B+b+
+0+=+-2%2A%28-1%29+%2B+b+
+0+=+2+%2B+b+
+b+=+-2+
----------------------
The equation is:
+y+=+-2x+-+2+
----------------------
Here's the plot:
+graph%28+400%2C+400%2C+-5%2C+5%2C+-5%2C+5%2C+-2x+-2+%29+