Question

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

Answer 1

the line is horizontal

Explanation:

Note the y- coordinates of the 2 points the line passes through are equal.

This indicates that the line is horizontal and parallel to the x- axis

The equation of a horizontal line is y = c

where c is the value of the y- coordinates the line passes through.

Here the y- coordinates are 30, hence

Equation of horizontal line is y = 30

Answer 2

It has a slope of zero because the change in the y-values is 0.

Explanation: