Question

Need a math god to help me on this.

Answer 1

When you plot these points you can see that the curve starts out high at a y value of 91, and as the x values grow slowly, by increments of 1, the y values drop rapidly.  It resembles a downward curve.  By that I could tell that it wasn't linear because it definitely wasn't a straight line; it wasn't either one  of those quadratics because long story short the vertices don't match the graph.  Therefore, by elimination I chose and then tested the exponential function.  For the first couple of points (0, 91) and (1, 70), $y=91(.77)^0$.  Anything raised to a power of 0 is 1 and 91*1=91.  For the second point, $y=91(.77)^1$ and 91*.77 = 70.07.  Therefore,  your choice is the second one down.

Answer 2

I got none of them...???
If you put x = 1 into all of them, none of them = 70, do they?