Question

A line passes through the points (9, 30) and (18, 30). Which statement is true about the line?

A) It has a slope of zero because the change in the y-values is 0.
B) It has no slope because the change in the y-values is 0.
C) It has a slope of zero because the change in the x-values is 0.
D) It has no slope because the change in the x-values is 0.

Answer 1

(9,30)(18,30)....when u have 2 sets of points and there y value is the same, then u have a horizontal line with a slope of 0

answer : A...it has a slope of 0 because the change in the y values

Answer 2

Option A It has a slope of zero because the change in the y-values is
`0`

Explanation:

we know that

The formula to calculate the slope between two points is equal to

`m=(y2-y1)/(x2-x1)`

we have

`A(9,30)\ B(18,30)`

Substitute the values

`m=(30-30)/(18-9)`

`m=(0)/(9)=0` ------> is a horizontal line

The slope is equal to zero, because the change in the y-values is
`0`