Question

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

zero
undefined
positive
negative

Answer 1

\[m = \frac{ y_2-y_1 }{ x_2-x_1 }\] is your slope if you're given a line with the points (4,6) and (-2,6) you can just plug it in the formula provided above \[m = \frac{ 6-6 }{ -2-4 } = ...?\] any idea what's going to happen?

Answer 2

would it be undefined?

Answer 3

if we have something that's undefined it means that the denominator is 0 and we don't want that. We can't divide by 0
1/0 <-- this doesn't make sense.
0/1 < --- makes sense because 0 divided by 1 is 0

Answer 4

not quite, you would get a horizontal line, when you have 0 in the numerator your answer is 0, when you have 0 in the denominator you would then get undefined, so what's the case here?

Answer 5

A?

Answer 6

\[m = \frac{ 6-6 }{ -2-4 } = ...? \]
what's 6-6
what's -2-4