In the economic analysis of supply and/or demand the variables of interest are not X and Y but instead Price (P) and Quantity (Q).

1.      In the economic analysis of supply and/or demand the variables of interest are not X and Y but instead Price (P) and Quantity (Q). By convention P is always the vertical axis and Q is the horizontal axis.

Below are algebraic representations of supply or demand functions. Graph each separately and beside your graph, list the Y-intercept and slope of each (and whether is a supply or demand equation).

a.      P= 500 - 100

b.      70Q + 7P = 3500

c.      Q= 50 - 0.1P