Help and explain how to solve these problems plz 10 points


It is given that y varies directly as x. If y = 5 when x = 4 determine the constant of variation.

A.-4/5\

B.4

C.5

B.5/4


It is given that y varies directly as x. If y = 10 when x = 3 determine the constant of variation.

A.-3/10

B.10

C.3

D.10/3


Which of these is true?


A.780,500 is less than 880,500.

B.780,500 is greater than 880,500.

C.880,500 is greater than 950,100.

D.880,500 is less than 780,500