Answer: y=2x-2
Explanation: slant asymptotes are present when the degree of the numerator is one degree greater than the degree of the denominator. You can use long division (ignore the remainder, if any) and answer in the form y=mx+b.
BUT THIS PROCESS IS NOT NEEDED RIGHT NOW BECAUSE YOU CAN FIND IT FROM THE GRAPH! (I added the information just in case) For this all you have to do is find the slope and y-int for the red line and plug the values into y=mx+b.