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

Therefore, the answer to number 2 is yes.

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

12

3

8

2

4

1

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 2

X 15/10

Since the ratios of the corresponding sides are not equal, this is NOT a proportion.

THE ANSWER IS NO!

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

Cross Multiply to solve for x.

28x = (12)(14)

28x = 168

28x = 16828 28

1 x = 168 28

x = 6

Method 1

14

6

2

2

28

12

Method 2

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

Method 1

73

339

d 2137

933

x

x

Since similar figures• Have corresponding angles that are congruent.

The answer is 30 degrees.

Follow the formula. It was given to you.

28

14Reduce or Divide.

2

1

Note: you must use corresponding side lengths

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

510

4 x

sidelongest

sideshortest

÷2

÷2 X =2

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

hours

x

time

Songs

2.min30

10

.min120.min30

10 x

time

Songs

X 4

X 4

X =40

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

Cross Multiply to solve for x.

100x = (80)(70)

100x = 5600

100x = 5600100 100

1 x = 5600 100

x = 56

THE ANSWER IS 9 FOR $15.30

Different Signs …. SubtractTake the sign of the largest absolute value.

-37 19

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

+ 1.5030

$31.50

9

811.1628 116.28

36 in = 3 ft

7ft x 3ft21 ft squared

-4 82

70

7000

164

14

0.15 =15%


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

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