Continuous or Discrete Length of hair over a month Number of cars in the parking lot over a 24 hour period Student enrollment at Strack over 2 years Rainfall totals each month for the summer Number of desks in a classroom over the year Time you walk your dog each day for a week

 You are paying to print pictures from your digital camera at the photo shop. You choose 4 x 6 pictures for all of them. These prints cost $0.49 each.  Write a function rule for this.  Make a table.  Now graph it. Continuous or discrete? Dependent variable (y) Independent variable (x) Scale

Continuous or discrete? Dependent variable (y) Independent variable (x) Scale xy Example 2

 The cost C, in dollars for a health club membership depends on the number m of whole months you join. This situation is represented by the function rule C = m.  What does the 49 represent?  What does the 20 represent  Continuous or discrete?  Independent variable?  Scale?  Graph:

 Graph: y = |x| + 2

 Graph: y = x 2 + 4

 The area, A, of a rectangle is a function of its width, w. If the length is always 5 cm in this case, write a function rule for this situation.  Continuous or discrete?  Independent variable?  Dependent variable?  Scale?

 What shape would the graph of y = x 3 be?  How can you find out?  What about y = x 4 ?  What about y = x 5 ?  Do you see a pattern?