Write a possible equation for an 8th degree polynomial function whose graph crosses the x-axis at -9 and 7, but only touches at 1

Current profit:
y = 27x  ; where x is the number of skateboard decks sold and y is the total amount of profit.

New type material:
y = 32x ;

If Jacob will pursue the new type material, he will earn an additional 5 profit per skate board from his previous scheme.

The additional 5 is the difference of 32 and 27.