Answer:
option B. constant
Step-by-step explanation:
In the graph attached there is a straight line parallel to x-axis that is y = 3.
Intercept form of a line is given by y = mx + c
where m = slope of the line
c = y-intercept
When we compare the line y = 3 to the intercept form of the equation we find m = 0, so this line is parallel to x-axis.
and y = 3 is constant.
Therefore, option B. constant is the answer.
