Math G7 Review

A line that rises from left to right has a __________ slope.

• positive

• negative

• zero

• i don't know

A straight horizontal line has a zero ______.

• product

• measurement

• slope

• proportion

Find the slope: (-2,-3), (3,3) | Remember: (x,y) | Don't turn the fraction into a mixed fraction

• 6/4

• 4/6

• 5/4

• 84

Julia plotted two points on a graph: (4, -6), (-2, 5). She said the rise was 11 and the run was 5. After, she said the slope was 5/11. Is she correct? If not pick the choice that best explains

• She's correct

• She's incorrect because the rise is 5 and the run is 11.

• She's incorrect because slope is supposed to be rise over run

• She's incorrect because she calculated the rise and run wrong.

Solve the proportion: 4/6 = c/108

• c = 72

• c = 102

• c = 76

• c = 36

The three ways to solve a proportion

• Algebra

• Cross Product

• Equivalent Ratios

• Measurement

• Scale Drawings

Solve the proportion: 1/5 = 5/d

• d = 25

• d = 10

• d = 30

• d = 5

Use the scale to solve the problem. Architect Billy made a room plan for the basement. He used the scale 1 in. : 6 ft. The length of the room was 6 inches and the width was 5 inches. What is the length and width?

• 36 feet long and 30 feet wide.

• 36 inches long and 30 inches wide

• 12 feet long and 11 feet wide

• 30 feet long and 24 feet wide

Use the scale to find the dimension: A new museum was being made and scale model was used with the scale 1 in. : 30 feet. When the building was done the height of the building was 180 feet. What is the dimension?

• 6 in.

• 5 in.

• 1 in.

• 90 in.

Find the scale model: Aeriel was building a new room for gaming. He used a scale that was used by the construction workers. The model was 20 inches, from top to bottom and left to right. When the room was done the room was 30 feet long and wide. What scale did Aeriel use?

• 1 : 36

• 1 : 24

• 1 : 20

• 1 : 18