Y=4x+2
Plug in what they gave you to the formula y=Mx+b 
 The slope was given 8/2 —> simplify =4
And we don’t know what x and y is so we leave the variables like how it is
They gave us the y intercept which is B so plug in positive 2 
So plug it into the equation 
Now we have 
y=4x+2