Answer:
4.5x OR 9/2x
Explanation:
We know this is a lineasr equation isnce it is a straight line and goes by a slope factor.
We know that for every change in 9 on the y axis, there is a change of two on the x- axis. This slope is now 9/2
The equation can be 9/2x OR 4.5x depending on whether your teacher will accept decimal answers or fractional answers.