30.0% complete
gas
electric
$200+
x
x
$150+
x
100+
kert
x
$50+
$0
jan feb mar apr may jun
jul aug sep oct nov dec
what trend exists for the gas bill during the year?
a. increases throughout the year
b. decreases throughout the year
c. decreases and then increases during the year
d. increases and then decreases during the year
support

the answer would be 44.79

plz mark brainliest

step-by-step explanation:

step-by-step explanation:

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.