September, 2011 | The Economics Classroom

Linear Demand Equations – Shifts in Demand (changes in the ‘a’ and the ‘b’ variables)

In our 3rd lesson on linear demand equations we’ll learn how a change in a non-price determinant of demand can cause the ‘a’ variable to change and a shift inwards or outwards of the demand curve along the quantity axis.

In our final lesson on linear demand equations we’ll look at how a change in a non-price determinant of demand can cause the demand curve to pivot along the quantity axis, changing the ‘b’ variable, resulting in either an increase or a decrease in the responsiveness of consumers to price changes.

Linear Demand Equations – part 3

Linear Demand Equations – part 4

Introduction to Linear Demand Equations

This is an update to the 2012 version of the lesson introducing how to determine an equation for demand using price and quantity data from a demand schedule or a demand curve. In parts 2 and 3 of this lesson we’ll examine how changes in price and the non-price determinants of demand will lead to movements along a demand curve or a change in the ‘a’ and ‘b’ variables and a shift in demand.

Linear Demand Equations – Part 1