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

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

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

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

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

Therefore, set up a proportion.

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.

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

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

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

Method 1

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

Since similar figures Have corresponding angles that are congruent.

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

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

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

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

Different Signs …. Subtract Take the sign of the largest absolute value

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

in = 3 ft 7ft x 3ft 21 ft squared

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