1. for the data in the table does y vary directly with x? if it does write an equation for the direct variation.
x|y 8|28 16|56 20|70 a. yes; y=5x b. yes; y=x+20 c. yes; y=3.5x** d. no; y doesn't vary directly with x 2. for the data in the table does y vary directly with x? if it does write an equation for the direct variation.
x|y 40|32 28|16 16|12 a. no; y does not vary directly with x** b. yes; y=2x c. yes; y=1.5x d. yes; y=0.2x answer whenever you get the chance. i really need on this. you : )

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form or

Part 1)

Find the value of k for each data in the table

a) For the point

b) For the point

c) For the point

therefore

the value of k is equal for the three points in the data set

so

the data represent a direct variation

the equation is equal to

therefore

the answer Part 1) is the option C

yes;

Part 2)

Find the value of k for each data in the table

a) For the point

b) For the point

c) For the point

therefore

the value of k is different for the three points in the data set

so

the data not represent a direct variation

therefore

the answer Part 2) is the option A

no;y does not vary directly with x

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right