Lisa bought 3 packs of red bouncy balls and 2 packs of yellow bouncy balls. each package contained 7 bouncy balls. how many more red bouncy balls than yellow bouncy balls did lisa buy?

the answer is 7

Step-by-step explanation:

1) multiply 3 * 7 which is 21

2) multiply 2 * 7 which is 14

3) subtract 14 from 21

4) and you got 7

So you have 7 more red bouncy balls

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!