Answer:

Step-by-step explanation:
Given 
Let 
Interchange x and y

Solve for y, by first squaring both sides


Hence

The last choice is correct
You have to use the y=mx+b formula to find the equation
C ljsijsosbsosjsoskdksbsjsbs
The answer is 1.5 because of my calculations
In mathematics, two variables areproportional if there is always aconstant ratio between them. Theconstant is called the coefficient ofproportionality or proportionality constant. ... x and y are directlyproportional if the ratio yx is constant.
In other words, the constant of proportionality is also the slope, **m**, rate of change, etc.