find the slope and y-intercept of x=-7?

Question

here are the choices,
A) slope:0; y-intercept:none
B)Slope:undefined; y-intercept: none
C)Slope; undefined; y-intercept;(0,-7)
D)Slope:0; y-intercept:(0,-7)

which one is it and Why?

Answer 1

B, because if x is always -7, it will be a straight up-and-down line and never cross the y-axis. No vertical line crosses the y-axis unless x=0

Vertical lines have undefined slope.

[EDIT]I believe the person below me (Amber H) means to say B because she said there was no y-intercept, but C says the Y-intercept is (0,7)

Answer 2

The answer is B. An x= equation is always going to be a vertical line, because the x value stays constant and the y values change. (-7, 1) (-7, 2) (-7, 3) are all on top on each other, thus, a vertical line. Since slope is change in y over change in x (rise over run), that would be (change in y)/0, since the change in x is 0. And you cannot divide by a negative, thus, The slope of x is undefined.

Since the line is a straight, vertical line on -7, it will never cross the y intercept (which is located when x = 0), thus, there is NO y intercept.

Hope that helps.

Answer 3

Slope is undefined because the slope is the change in y divided by the change in x, but x is always the same so you'd be dividing by zero, which is undefined.

And since x is always -7 it's never 0, meaning it never crosses the y axis, meaning there's no y-intercept.

B.

Answer 4

it is C i believe because x= -7 is a vertical line meaning its slope is undefined and since it is a vertical line crossing the x axis, it does not cross y meaning there is no y intercept.

Answer 5

slope is undefined
no y-intercept

chioce b

any equation that is an x=a number
the slope is always undefined and the x-intercept is equal to the number, but no y-intercept