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