Q. What is the slope of the line x=9?Choose 1 answer:(A) 0(B) 9(C) 10(D) Undefined
Line Equation Form: The equation of the line is given in the form x=a constant. This form indicates a vertical line.
Undefined Slope: The slope of a vertical line is undefined because the change in y is not associated with any change in x (the line goes straight up and down).
Vertical Line Solution: Since the line is vertical and the slope is undefined, the correct answer is (D) Undefined.
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