Use compatible numbers to find two estimates 42/396

If a || b and e || f , what if the value of y ?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.