Originally Posted by

**stackcheddar** The supply graph is made up of two linear graphs. I worked out the equations for these linear graphs.

For example, to work out what quantity is demanded at price $1.5, I first find out how much is being supplied at price $1.5.

Note: $1.5 lies within the FIRST segment of the supply graph, so I plug this number into the first linear equation I worked out to find out how much is being supplied at this price. In this case, it is 18750.

To find out how much is demanded at price $1.5:

18750*89.46% = 16773.75

This is what I've done in the formula in column F of the excel sheet.

HTH and GL