Question

Line CD contains points A (4, -7) and B (4, 8). The slope of line CD is (4 points)


zero
undefined
positive
negative

Answer 1

@AlexandervonHumboldt2

Answer 2

slope formula is \(m=\dfrac{y_2-y_1}{x_2-x_1}\)

Answer 3

The line is vertical, so the slope is undefined.

Answer 4

Thankx Guys!!

Answer 5

8 - (-7) / (4 - 4) = (8 + 7) / 0 = 15/0
when there is a zero in the denominator, the slope is undefined because it is a vertical line. If the 0 would have been in the numerator, slope would have been 0