Which of the following exponential functions best describes the table below?
x: -0.1 , 0, 0.1, 0.2
y: 6, 3, 1.5, 0.75
a)y=6(1/2)^10x
b)y=3(1/2)^x/10
c)y=3(1/2)^10x
d)y=3(2)^1