Learning Resources

Using the Subsets to Define Domain and Range

Answers to Activities Questions

1. (a) 0
   (b) Whole numbers
   (c) {n | 0 £ n, where n Î W} 
   (d) {n | 4 £ n, where n Î W}
   (e) {n | 4 £ n £ 25, where n Î W} 

2. (a) Whole numbers
   (b) The number of articles must lie between 5 and 24 inclusive
         {n | 5 £ n £ 24} where n Î whole numbers
   (c) {y | $1250 £ y £ $6000}

3. (a) {h | 0 £ h £ 40} where h Î real numbers
   (b) The minimum = $0 and maximum = $240
   (c) {y | $0 £ y £ $240} where h Î real numbers
   (d) Domain = {h | 8 £ h £ 40} where h Î real numbers
         Range = {y | $48 £ y £ $240} where h Î real numbers

4. (a) Domain = {k | 6 £ k} where k Î real numbers
   (b) Range = {t | 6.7 £ t} where t Î real numbers
   (c)  Domain = {k | 6 £ k £ 18} where k Î real numbers
          Range = {t | 6.7 £ t £ 9.7} where t Î real numbers