Find a possible formula for the exponential function through the points (−2,72) ( − 2 , 72 ) and (2,8/9) ( 2 , 8 / 9 ) graphed below

Answer 1

1) write general formula for Exponential Equation Y = a(b)^x

2) plug in order pairs of 2 points (-2,72) and (2,8/9). You will get 72=a(b)^-2 and another equation 8/9=a(b)^2

3) Solve the system of equation by dividing both sides. a will be deleted and b^4=1/3^4 and b=1/3. Plug in 1/3 you will get a=8

4) your equation will be Y = 8(1/3)^X

Answer 2

Sure do need the graph to understand this!