What is a ratio?
Unit 3 Review

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Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.
2.
FLASHCARD QUESTION
Front
How do you write a ratio as a fraction?
Back
To write a ratio as a fraction, place the first quantity (part) over the second quantity (whole) in the form of a/b.
3.
FLASHCARD QUESTION
Front
What is the constant of proportionality in the equation y=kx?
Back
The constant of proportionality (k) is the ratio of y to x, representing how much y changes for a unit change in x.
4.
FLASHCARD QUESTION
Front
If a scale is 1 inch = 2 feet, how do you convert feet to inches?
Back
To convert feet to inches, multiply the number of feet by the scale factor (0.5) since 1 inch represents 2 feet.
5.
FLASHCARD QUESTION
Front
How do you set up a proportion to solve for an unknown height?
Back
6.
FLASHCARD QUESTION
Front
What is the formula for finding the equivalent ratio?
Back
To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.
7.
FLASHCARD QUESTION
Front
How do you find the total number of students from a ratio of boys to girls?
Back
Add the parts of the ratio together to find the total. For example, if the ratio is 5 boys to 8 girls, total = 5 + 8 = 13.
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