Answer:
y = 6x
Explanation:
We can find the relationship by looking at each value for X and Y and finding which number makes the equation true
The first equations says Y = 3 when X = 0.5, Lets put this into an equation

The only number that would make this equation true is 6

Lets try another, The Third equation says that Y = 9 when X = 1.5

Again, the only number that works is 6

Hence the equation for this table is
