Which of these tables represents a function?

a)
game number season 1 season 2
1 3980 3210
2 4060 4180
3 4190 3020
4 3820 3670
5 4100 5320

b)
x f(x)
0 -1
1 0
2 -1
1 -2

c)
x f(x)
0 2
1 2
2 2
3 4

d)
x f(x)
1 -2
0 -1
1 -2
4 1

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

What could explain what happened when the time was equal to 120 minutes

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?