EOC Review - 12.A,12.B, 2.D Functions and Direct Variation

The value of y is directly proportional to the value of x. When x = 512, y = 128. What is the value of y when x = 64?

• 256

• 32

• 16

• 8

The total distance in centimeters a toy robot moves varies directly with the time in seconds. The toy robot moves a total distance of 264 centimeters in 11 seconds. What is the time in seconds the toy robot moves when the total distance is 408 centimeters?

• 24 s

• 17 s

• 13 s

• 37 s

The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105?

• 7

• 15

A function is shown: g(x) = 6(2x + 7). What is the value of g(20)?

• A) 167

• B) 282

• C) 324

• D) 247

• A) 27

• B) -13

• C) -15

• D) 140

• 29

• 17

• 41

• 27

• $20,780

• $12,800

• $28,800

• $20,760

• 690

• 736

• 622

• 626

The value of y varies directly with x. When the value of x is 4, the value of y is -12.

What is the constant of variation when y is a function of x, and what is the value of y when x= -6?

Move the correct answer to each box. Each answer may be used more than once. Not all answers will be used.

The constant of variation is ​ (a)  

The value of y when x= -6 is ​ (b)  

• -3
• 18
• -18
• -2
• -1/3
• 1/3
• 2
• 3

The value of y is directly proportional to the value of x. When x= 3.5, the value of y is 14.

What is the value of y when x=28?

Mathematical Equivalence

ON