In 1980, a Domino's large pizza cost $4.99. What would be the cost of that pizza in 2000?
What would be the cost in 2015?
What would you expect the pizza to cost in 1981?

The pizza cost 5.04 in 2000

Step-by-step explanation:

Step One:  set the price of the pizza in 1980 equal to the price in 2000

$4.99              ?

           =  

1980           2000

Step two: Divide 1980 by 2000

1980 / 2000 = 0.99

Step Three: Divide 4.99 by 0.99

Reason: You know that 1980/0.99= 2000 and what ever you do to the denominator you have to do to the numerator and vice versa.

4.99 / 0.99 = 5.0404040

Step Four: Answer

The pizza cost 5.04 in 2000

Keep doing this until you get all of the years (2015 and 1981) pizza prices

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4