Determine the Center and radius on f the circle corresponding to the equation

How can you tell when x and y are not directly proportional?

What is r i 4.5+10r=-6.5 with work pls

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.