Direct Variations

Which of the following is the mathematical translation of "m varies directly as r"?

Which of the following is the mathematical translation of "The area A of the square varies directly as the squares of side s"?

Which of the following equations does NOT represent a direct variation?

Which of the following table of values represents a direct variation?

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• 
• 
• 

What is the constant of variation the given table of values?

• 4

• 1/4

• -4

• • - 1/4

If x varies directly as y and x = 10 and y = 5, what is the value of the constant of variation?

• 2

• 1/2

• -2

• • - 1/2

If h varies directly as j and h = 4 and j = 6, what is the value of the constant of variation?

• 2/3

• 3/2

• 2

• • 3

If h varies directly as j and h = 4 and j = 6, what is the value of j if h = 14?

• 21

• 14

• 7

• • 28

If x varies directly as y and x = 10 and y = 5, what is the value of y if x = 30?

• 15

• 60

• -15

• • -60

A coffee drinker loves his coffee that in every 150 grams of coffee, there should be 1/2 teaspoon of sugar per serving. How many grams of coffee is need when he has 15 teaspoons of sugar?

• 4,500 grams

• 4,000 grams

• 2,250 grams

• 2,500 grams