SOLUTION: The function S = 500 + 200X and D = 9500 - 100X express the supply S and the demand D, respectively, for a popular compact disc brand as a function of its price x (in dollars.

Algebra ->  Linear-equations -> SOLUTION: The function S = 500 + 200X and D = 9500 - 100X express the supply S and the demand D, respectively, for a popular compact disc brand as a function of its price x (in dollars.       Log On


   

Question 145264This question is from textbook Elementary and Intermediate Algebra
: The function S = 500 + 200X and D = 9500 - 100X express the supply S and the demand D, respectively, for a popular compact disc brand as a function of its price x (in dollars.
A) Graph the functions on the same coordinate system. This question is from textbook Elementary and Intermediate Algebra

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
he function S = 500 + 200X and D = 9500 - 100X express the supply S and the demand D, respectively, for a popular compact disc brand as a function of its price x (in dollars.
A) Graph the functions on the same coordinate system.
Plot both equations; you can use x=10, x=50; find y for each as follows:
:
y = 500+200x (Purple)
x | y
-------
10 | 2500
50 | 10500
:
y = 9500-100x (Green)
x | y
-------
10 |8500
50 |4500
:
+graph%28+300%2C+200%2C+-20%2C+100%2C+-1000%2C+12000%2C+200x%2B500%2C+-100x%2B9500%29+
:
you can see that D = S at x = 30, y = 6500