Answer: C.
Step-by-step explanation
The equation of the line can be written in the slope-intercept form:
where m is the slope and b is the y-intercept.
Therefore, we can get the y-intercept from the graph:
Thus, the y-intercept is y = 0, meaning that b = 0.
Then, we can replace the point given (3, –1) in the equation and solve for m:
Finally, replacing the value we get the equation: