Answer i need it fast : ) does the equation y-x=0 show direct variation?

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)

Which polygon is she in the process of constructing ?