Answer:
B) y = 9
Step-by-step explanation:
Equation of a line in slope-intercept form: y = mx + b
(where m is the slope (gradient) and b is the y-intercept)
If the line is parallel to the x-axis, the slope is zero.
Therefore, y = (0)x + b
⇒ y = b
We are told that the line passes through point (-1, 9). Therefore, the y-intercept is 9.
So the equation of the line is: y = 9
