These next two problems are a little harder. See if you can do them. Remember to apply the order of operations: simplify inside parentheses first; then multiply and divide left to right; finally add and subtract left to right.
Suppose you have determined that the quantity demanded of eggs depends on their price and the income of consumers. Prior to quantifying these relationships using a mathematical model you want to be sure of their directional relationships. Which statement is likely to be true?