| Symbol & Abbreviation |
Meaning |
| Δ |
Change or Difference (ΔQ means the change in Quantity Demanded from time 1 to time 2 |
| + |
Plus, Rise, Goes Up, Increases, Add |
| – |
Minus, Fall, Goes Down, Decreases, Subtract |
| QD |
Quantity Demanded (The number of products the consumers want and can purchase) |
| QS |
Quantity Supplied (The number of products the suppliers have available on the market) |
| P |
Profit |
| p |
price |
| ± |
Plus or Minus. (QS = ±3 means that QS can either go up or down 3 depending on what you changed). |
| X < Y |
X is less than Y |
| X > Y |
X is more than Y | X is greater than Y |
| X |
the Vertical line on a graph |
| Y |
the Horizontal line on a graph |
Deceptively Blonde 