Which set of ordered pairs is NOT a function? {(0,0), (1,1), (2,2), (3,3)} {(1,2), (3,4), (4,5), (5,6)} {(4,1), (5,1), (6,1), (7,1)} {(3,1), (2,1), (1,2), (3,2)}

What is the missing step in this proof ?

Determine if the function below is continuous. a. continuous b. not continuous, 1 hole c. not continuous, > 2 holes d. not continuous, 2 holes

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.