Question

PLEASE HELP: Suppose that in 2001, the average cost of a gallon of milk was $2.43. In 2007 the average price was $4.21. Assuming the relationship is linear, find the equation of the line that models the price of milk over time since 1999. Round to the nearest thousandth.

Answer 1

x is the year and y is the price

general linear exquation: y=kx+d

i. 2.43=k*2001+d
ii. 4.21=k*2007+d

now make the gaussian elimination i-ii and you get your equation.
then put 1999 in x and you have the result

Answer 2

can you explain more im confused

Answer 3

I'll answer it in an hour if nobody else does till then. Can't atm