Question

A vertical line has a(n) ________ slope.

A. undefined
B. negative
C. zero
D. positive

Answer 1

A

Answer 2

Find the slope of the line containing the points (-2, -2) and (-4, -2).

A. -1
B. 1
C. 0
D. undefined

Answer 3

??

Answer 4

That was a vertical line. In a vertical line, all points have the same x-coordinate.
When you calculate the slope, you can use any two points, but since you always divide by the difference of x values, the slope will involve division by zero, which is undefined. That's why the slope of a vertical line is undefined.

Answer 5

For your second question, to find the slope, find the difference of the y-coordinates. Then find the difference of the x-coordinates. Divide the first difference by the second difference.

Answer 6

i got -2, and 0

Answer 7

Be careful with the order.
Do the difference of y's first: -2 - (-2) = -2 + 2 = 0
Now the difference of x's : -2 - (-4) = -2 + 4 = 2

Now divide the diff in y by the diff in x:

slope = 0/2 = 0
slope = 0

Answer 8

i cant divide -2 by 0

Answer 9

You don't need to divide -2 by 0. In this problem you need to divide 0 by -2, which you can do, and whose result is 0.

Answer 10

ok, thanks

Answer 11

In what direction is the line containing the point (5, 4) and (-2, 4) going?

A. horizontal
B. vertical
C. up and to the right
D. down and to the right

Answer 12

Memorize this:
Positive slope: up to the right
Negative slope: down to the right
Zero slope: horizontal
Undefined slope: vertical

Answer 13

so up and to the right?