Question

Line CD contains points A (4, 6) and B (4, 3). The slope of line CD is (2 points)

positive
undefined
negative
zero

Answer 1

slope is undefined

Explanation:

Calculate the slope m using the slope formula

m =
`(y_(2)-y_(1) )/(x_(2)-x_(1) )`

with (x₁, y₁ ) = A(4, 6) and (x₂, y₂ ) = B(4, 3)

m =
`(3-6)/(4-4)` =
`(-3)/(0)`

Division by zero is undefined thus the slope of CD is undefined