Unit 3 Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

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.

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.

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.

Front

How do you set up a proportion to solve for an unknown height?

Back

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.

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.

Front

What does it mean if two ratios are equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities, meaning they simplify to the same fraction.

Front

How do you calculate the unit rate from a ratio?

Back

To calculate the unit rate, divide the first quantity by the second quantity to find the amount per one unit of the second quantity.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object where the dimensions are proportional to the actual dimensions, using a specific scale.