Exam 3: Section 1: Linear Equations and Inequalities in Two Variables

Write a formula that expresses the relationship described below. P varies jointly as x and y and P = 4 when x = 7 and y = -7

Write the equation in standard form using only integers and a positive coefficient for x.

Which of the following is the correct graph of the line through (3, 2) with slope ?

A playground equipment manufacturer plans to spend $300,000 on a new facility plus $160 for each swing set made.The formula C = 160n + 300,000 gives the cost in dollars to manufacture n swing sets. What is the marginal cost of the nth swing set? [Hint - the marginal cost of the nth swing set is the difference in cost of producing n + 1 swing sets and n swing sets).

Which point below is located at coordinates (-1, 3)?

Does the point (2, 14) satisfy the inequality y  2x - 2?