Econ 100 Principles of Microeconomics
Diagnostic Math Exam
1. Solve the following simultaneous equations. What are the values of X, Y?
2X + 3Y = 9
X-Y=4
2. Find the slope of the line represented and y-intercept by the following equation
and draw the graph:
Y = 3x - 2
3. Percentage change
Year
Price of Microeconomics textbook
2016
$80
2017
$120
2018 $80
i. What is the percentage change in prices between year 2016 and 2017?
ii.
What is the percentage change in prices between year 2017 and 2018?