Answer:
y = 4/5x
Step-by-step explanation:
y = mx + b
mx is the slope, more specifically m, so just replace m with the slope given which is 4.5.
There's no need to write y = 4/5x + 0 as it's just zero, if there isn't any intercept in a equation it means that it's y-intercept is 0. So b is not needed.
