please help me, am giving 50 point :)

Answer:
[tex]2\cdot3^x[/tex]
Step-by-step explanation:
I knew that a had to be 2, because when x=0 y had to be 2, and anything to the power of 0 is 1. And for the next value to be 6, and 6/2=3, b had to be 3. Hope this helps!