Posted by logan on Thursday, January 17, 2008 at 9:45pm.
A. Find the slope (rise/run). Plug x and y into your equation with the slope to find the y-intercept and then you'll have your y=mx+b equation.
B. Should look like a "V" shape open upward starting at the vertex at (0,0). Basically "x" can be any number and "y" must be greater or equal to 0.
C. Base on your findings on A & B, you should be able to answer this question. Compare the slopes or y-intercept and you can see that on part B, there's a restricted value for the y values and part B has no restriction...etc.
I would add to B that the lines depart the origin at 45 degrees from the x (and y) axis.
Both involve straight line graphs at 45 degrees to the axes
the first one has a y range from - infinity to + infinity.
The second one has a y range from 0 to + infinity as Jake said.
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