Proportions
Flashcard
•
Mathematics
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a proportion?
Back
A proportion is an equation that states that two ratios are equal.
2.
FLASHCARD QUESTION
Front
How do you determine if two ratios form a proportion?
Back
Two ratios form a proportion if the cross products are equal.
3.
FLASHCARD QUESTION
Front
What is the cross product of the ratios a/b and c/d?
Back
The cross product is ad and bc. If ad = bc, then a/b = c/d is a proportion.
4.
FLASHCARD QUESTION
Front
What is a proportional relationship?
Back
A proportional relationship is one where two quantities maintain a constant ratio.
5.
FLASHCARD QUESTION
Front
What does it mean for a graph to be proportional?
Back
A graph is proportional if it is a straight line that passes through the origin.
6.
FLASHCARD QUESTION
Front
If 4 pounds of apples cost $8, how much do 10 pounds cost?
Back
$20 (10 pounds = 4 pounds x 2.5, so $8 x 2.5 = $20).
7.
FLASHCARD QUESTION
Front
What is the formula for finding a missing value in a proportion?
Back
If a/b = c/d, then ad = bc. You can solve for the missing value using this equation.
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