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Direct Variation
Közreműködött: Dolch

y varies directly as x.

 

y = –8 when x = –2

 

What is the equation?

 

Find x when y = 32.

y varies directly as x.

 

y = 45 when x = 15

 

What is the equation?

 

Find x when y = 15

y varies directly as x.

 

y = –4 when x = 2

 

What is the equation?

 

Find y when x = –6.

y varies directly as x.

 

y = –9 when x = 3

 

What is the equation?

 

Find y when x = –15.

After 25 minutes, a swimmer has completed 100 laps.

 

How many laps can she swim in 46 minutes?

Two pounds of jelly beans costs $12.

 

If I spend $21, how many pounds did I buy?

Twenty concert tickets costs $600.

 

If I buy 4 tickets, how much did I spend?

After three years, Bill has been

given 21 detentions.

 

After his fourth year, how many detentions

 will he have?

 

"a varies directly as b".  If a = 3 when b = 24,

 find b when a = 10.

 36

 8

 1.25

 80

If m varies directly as y and m is 6 when y is 36,

 find the constant of variation.

  6

 36

1/6

1/36

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