SOLUTION: A company noticed a linear relationship between the price of a luggage set and the number of luggage sets sold. At $100, the company sold 1,000 sets. When the company raised the pr

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A company noticed a linear relationship between the price of a luggage set and the number of luggage sets sold. At $100, the company sold 1,000 sets. When the company raised the pr      Log On


   

Question 966967: A company noticed a linear relationship between the price of a luggage set and the number of luggage sets sold. At $100, the company sold 1,000 sets. When the company raised the price to $120, they sold 800 sets
Which equation relates the price of the luggage sets to the totals number of luggage sets sold?
A) y - 100 = 10(x - 1,000)
B) y - 1,000 = 10(x - 100)
C) y - 100 = -10(x - 1,000)
D) y - 1,000 = -10(x - 100)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
m=%28800-1000%29%2F%28120-100%29=-200%2F20=-10
Use the point-slope form of a line,
y-y%5B1%5D=m%28x-x%5B1%5D%29
y-1000=-10%28x-100%29