Question 1011495
What is the slope of the line that is parallel to x=4?
x=4 is parallel to the y-axis, often called vertical.
x is constant.
slope m = diffy/diffx = diffy/0 --> undefined, or infinite.
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What is the slope of the line that is perpendicular to x=4?
Parallel to the x-axis.
No change in y --> m = 0