Solve the problem. See Example 9.Buying stock. A mutual fund manager spent $329,175 on x s...

Solve the problem. See Example 9.

Buying stock. A mutual fund manager spent $329,175 on x shares of Exxon Mobil Stock at $66.50 per share and y shares of Walmart stock at $49.50 per share.

a) Write a linear equation that models this situation.

b) If 990 shares of Exxon Mobil were purchased, then how many shares of Walmart were purchased?

Figure for Exercise 102

c) Find and interpret the intercepts of the graph of the linear equation.

d) As the number of shares of Exxon Mobil increases, does the number of shares of Walmart increase or decrease?