Answer:
a=3, b=5
Step-by-step explanation:
From first point (0,3), put that point in equation y=ab^x
x=0 y=3 we have ab^0=3, i.e
a=3 because b^0=1.
Put now (1,15) in equation we get:
3b^1=15, i.e 3b=15, so b=5.
You can check others poInta from graph it will be true
3*5^2=3*25=75
3*5^3=3*125=375
