The graph shows how many cups of food are in an automatic pet feeder after given numbers of days. which statement is correct?

a.
every3/4-day, the amount of food decreases by 1 cup.

b.
every day, the amount of food decreases by 4/3 cups.

c.
every 3 days, the amount of food decreases by 4 cups.

d.
every 4 days, the amount of food decreases by 3 cups.

The correct answer is D

Step-by-step explanation:

I Just took the test

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.