Help whit these questions? Pls
Suppose y varies directly with x and y = 72 when x = 6. What direct variation equation relates x and y? What is the value of y when x = 10?

A. y=19x;109
B. y=x+9;19
C. y=9x;90
D. y=x−9;1

For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation.
A table showing data of x and y as (3,6),?(5,10) and (7,14) respectively.

A. No it does not.
B. yes; x = 2y
C. yes; y = x + 2
D. yes; y = 2x

The cost of renting a scooter varies directly with the number of hours. It costs $37.50 to rent a scooter for 5 hours. What is an equation that relates the number of hours x, to the rental cost, y?

A. y = 0.75x
B. y = 7.5x
C. y = 75x
D. y = 750x

The area of a circle varies directly with the square of the radius. Since A = πr2, the constant of variation is π. Which of the following examples illustrates direct variation. Identify the constant of variation.

A. The circumference of a circle varies directly with the radius. The constant of variation is 2π.
B. The average of 2 numbers varies directly with either number. The constant of variation is the other number.
C. The slope of a line varies directly with the y-intercept. The constant of variation is the slope.
D. The distance between a number and 0 varies directly with the number. The constant of variation is the number.

Suppose y varies directly with x. If the value of x were to double, what would happen to the value of y?

A. The value of y would increase by 2
B. The value of y would also double.
C. The value of y would decrease by 2.
D. The value of y would be halved.