Answer choice a is a function because none of its x values repeat at all. There is only one -4 in the function. and same with all the x values
10.x=1
11.3/4y+4 , x=1/5y+1/5
12.x=2
Six two point shots is 12 points.
of the 21 scored, that leaves nine points, or three 3-point shots. (If my math is right)
