2. Step 1: Graph the points. You can extend the graph if needed.

3. When looking at the linear equation(the line), if it passes through the origin and makes a straight line. It is a proportional graph. Also called a direct variation

4. Look at your formula chart. Find the Constant of proportionality equation.

5. The Constant of Proportionality must be written in reduced form. So the answer is ¼.

6. Similar Figures Have corresponding angles that are congruent. Have corresponding sides that are proportional.

7. Therefore, set up a proportion.

8. Check that the numbers for a proportion. X 2 X 15/10 Since the ratios of the corresponding sides are not equal, this is NOT a proportion.

9. Once again, set up a proportion to solve for x.

10. Cross Multiply to solve for x. 28x = (12)(14) 28x = 168 28 1 x = 168 28 x = 6 Method 1 Method 2

11. Once again, set up a proportion to solve for d.

13. Method 1

14. Similar Figures Have corresponding angles that are congruent. Have corresponding sides that are proportional.

15. Since similar figures Have corresponding angles that are congruent.

17. Once again, set up a proportion to solve for x. ÷2

18. Once again, set up a proportion to solve for number of songs. X 4

21. Once again, set up a proportion to solve for the new cost.

22. Cross Multiply to solve for x. 100x = (80)(70) 100x = 5600 100 1 x = 5600 100 x = 56

24. Different Signs …. Subtract Take the sign of the largest absolute value. -37 19

25. I = ( $30)(5%)(1) I = ($30)(.05)(1) I = (1.50) (1) I = ($1.50)

26. 9 81 1.1628 116.28 36 in = 3 ft 7ft x 3ft 21 ft squared

27. -4 82 70 7000

28. 16 0.15 =15% Similar Figures Have corresponding angles that are congruent. Have corresponding sides that are proportional.