Answer:
B
Explanation:
The slope intercept form for a line is y=mx+b, where m is the slope and b is the y intercept. Since this line rises 9 units for every 1 it moves to the right, it has a slope of 9. Since it goes through the origin, it also has a y intercept of 0. Therefore, the equation of this line is y=9x, or answer choice B. Hope this helps!