A bricklayer is building a brick rectangular post to anchor a mailbox. The post is 3 1/4 feet tall, 2 1/2 feet deep, 2 1/2 feet wide. Each brick is 3 1/2 inches by 6 inches 3 1/2 inches. About how many bricks does he need?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

hope this !

he answer is x=1x3 because x=1 to x=3