Question 22046
y=7 is a horizontal line:

{{{graph(300,300,-10,10,-10,10,7) }}}
The slope of any horizontal line is 0.  The y-intercept is 7, and there is NO X-intercept, since the graph does not cross the x axis.


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x= 4 is a vertical line through x=4.  I don't know how to graph this in algebra.com, but the slope of a vertical line is UNDEFINED.  The x-intercept is 4, and there is NO Y-intercept, since it doesn't cross the y axis.


R^2 at SCC