12/12 MLL Proportions and Percents Unit 3a Test

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio or rate. For example, if y = kx, where k is a constant, then y is proportional to x.

Front

How do you determine if a table of values represents a proportional relationship?

Back

To determine if a table is proportional, check if the ratio of y to x is constant for all pairs of values.

Front

What does the equation y = 6x represent? Is it proportional?

Back

The equation y = 6x represents a proportional relationship because it can be expressed as a constant ratio (y/x = 6).

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 15% of $26, calculate 26 * 0.15 = $3.90.

Front

What is the formula to calculate a tip based on a percentage?

Back

The formula to calculate a tip is: Tip = Total Bill Amount * (Tip Percentage / 100).

Front

If a dinner bill is $75.45, how do you calculate an 18% tip?

Back

To calculate an 18% tip on a $75.45 bill, multiply 75.45 by 0.18, which equals approximately $13.58.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit of another quantity.

Front

If Maria flies 1,000 miles in 10 hours, what is her speed in miles per hour?

Back

To find the speed, divide the distance by time: Speed = Distance / Time = 1000 miles / 10 hours = 100 miles per hour.

Front

What is the difference between proportional and non-proportional relationships?

Back

Proportional relationships have a constant ratio, while non-proportional relationships do not maintain a constant ratio.

Front

How can you express a percentage as a fraction?

Back

To express a percentage as a fraction, divide the percentage by 100 and simplify if possible. For example, 15% = 15/100 = 3/20.