5. Graphing Linear Equations in Slope-Intercept Form
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Is there a change in x?
Undefined
From the table, we notice that there is no change in x. This means the line is vertical and passes through x=0. Therefore, the slope of this line is undefined. We can verify this by substituting two points from the table into the Slope Formula.
Substitute ( 0,-4) & ( 0,0)
Subtract term
Division by 0 is undefined, so the slope of the line is undefined.