Which graphed lines represent direct variation functions?

line a
line b
line c
line d

Line a and line b represent direct variation functions.

Step-by-step explanation:

A function is called a direct variation function if the value of function or variable i y is directly proportional to the variable x.

Where, k is the constant of proportionality.

The value these type of function is 0 at x=0. It means the direct variation functions passes through the point (0,0).

From the given graph it is clear that the line a and line b passes through the point (0,0).

Therefore the line a and line b represent direct variation functions.

17.08

correct me if i am wrong.

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94