Answer:
D
Explanation:
It's undefined. x = 5 means that every x value is 5. How does that happen? What value of m will leave only x so that x = b?
Undefined is the only way that would happen. The y value is divided by infinity for a slope which leaves 0 on that side.
undefined
The slope of a vertical line ( line that goes up and down)
The y value changes but the x value does not
m = (y2-y1)/(x2-x1)
= (y2-y1)/ (x-x)
= (y2-y1)/0
Anything divided by 0 is undefined
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