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For the period 1985 - 2001, the average salary y (in thousands of dollars) per season of a Major League Baseball player can be modeled by y = 7x^2 - 4x + 392 where x is the number of years since 1985.

 

a. Write and solve an equation to find the year when the average salary was $1,904,000.

 

b. Use a graph to check your solution to part (a).

GAMEMASTERX40  Apr 11, 2018
edited by GAMEMASTERX40  Apr 11, 2018
 #1
avatar+87714 
+2

We want to solve this :

 

a)

 

7x^2 - 4x + 392  =  1904         subtract  1904 from both sides

 

7x^2 - 4x - 1512   =  0

 

Solving this for x gives = 14.985 yrs  ≈  15 years  (about the year  2000)

 

b)

 

Here's the graph :

 

https://www.desmos.com/calculator/13gj3kx7vy 

 

 

 

cool cool cool

CPhill  Apr 11, 2018
edited by CPhill  Apr 12, 2018

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