DIRECT VARIATION

Front

If y varies directly with x, and y = -20 when x = 3, what is y when x = 15?

Back

-100

Front

If y varies directly with x, and y = 8 when x = 3, what is x when y = -56?

Back

-21

Front

If y varies directly with x, and y = 21 when x = -7, what is y when x = 42?

Back

-126

Front

If y varies directly with x, and y = 16 when x = 32, what is y when x = -60?

Back

-30

Front

If y varies directly with x, and y = 22 when x = -11, what is y when x = 24?

Back

-48

Front

Determine if the relationship between the two quantities is a direct variation.

Back

Yes, the constant of variation is 2.

Front

Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.

Back

No, there is no constant of variation.

Front

Determine if the relationship between the two quantities is a direct variation.

Back

Yes, the constant of variation is 8.

Front

Determine if there is a constant of variation in the equation y = 9.50x, where y represents the number of dollars Marty paid for x movie tickets.

Back

The constant of variation is 9.50. This means that Marty paid $9.50 for each movie ticket.

Front

Determine if there is a constant of variation in the equation y = 0.10x + 45, which represents the cost y of a cell phone plan when x text messages are sent and received.

Back

There is no constant of variation. The cost does not vary directly with the number of text messages sent and received.