Homework Flashcardizz 12/16-12/20

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to determine the ratio of the dimensions of a model or photograph to the actual object.

Front

If Taylor Swift is 72 inches tall and appears 4 inches tall in a photograph, what is the scale factor?

Back

1/18

Front

What does it mean for a change in price to be negative?

Back

A negative change in price indicates that the price has decreased.

Front

How do you calculate the average change in price?

Back

To calculate the average change in price, sum all the changes and divide by the number of changes.

Front

If Lottie earns $282 for 12 lessons, how much does she earn per lesson?

Back

$23.50 per lesson.

Front

How do you find the total earnings for a different number of lessons?

Back

Multiply the earnings per lesson by the total number of lessons.

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant.

Front

Which of the following represents a proportional relationship: A delivery service charges $3 per package and a $2 fuel charge?

Back

No, this is not a proportional relationship because the total cost does not vary directly with the number of packages.

Front

What is the equation for Joe’s hourly earnings if he earns $15 per hour?

Back

y = 15x, where y is total earnings and x is the number of hours worked.

Front

What does the term 'average' refer to in mathematics?

Back

The average is the sum of a set of values divided by the number of values.