The variables y and x have a proportional relationship, and y = 7 when x = 2. what is the value of x when y = 21?

x=6

Step-by-step explanation:

We can use ratios to solve this.  The ratio has to stay constant if they are proportional.  Put y in the numerator and x in the denominator.

         7         21

        =

        2          x

We can solve using cross products.

7*x =2 *21

7x = 42

Divide each side by 7

7x/7 = 42/7

x =6

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

the answer is 0.3175 hope that you ^w^

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