SOLUTION: The slope of a line is 2 and the y-intercept is 4. What is the x-intercept?

Algebra ->  Linear-equations -> SOLUTION: The slope of a line is 2 and the y-intercept is 4. What is the x-intercept?      Log On


   

Question 691614: The slope of a line is 2 and the y-intercept is 4. What is the x-intercept?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
By visualizing, I know if the y-intercept is on the positive y-axis,
and the slope is positive, then the x-intercept is on the
negative x-axis.
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The slope is ( change in y ) / ( change in x )
The intercepts are (0,4) and (x[1], 0)
+%28+4+-+0+%29+%2F+%28+0+-+x%5B1%5D+%29+=+2+
+4+%2F+%28-x%5B1%5D%29+=+2+
+-x%5B1%5D+=+2+
+x%5B1%5D+=+-2+
The x-intercept is (-2,0)