Chapter 7 Vocabulary

Chapter 7 Vocabulary Ratio- comparison of a number and a nonzero number using division Ex. Boys in the house 10 2 Girls in the house 5 1 Rate- a type of ratio that compares two quantities Ex. 10 apples for $2 Proportion- an equation that states that two ratios are equal Ex. 3 5 = 9 15 Cross products-

Cross products property- In a proportion, the cross products are equal

Scale drawing- a diagram in which the length and width are the actual to the length and width of the object

Scale- gives the relationship between the drawing’s and the actual objects measurement Ex. 2 inches is 5 feet Scale factor- the ratio of the length and width of the drawing to the actual length and width.

Outcomes- the possible results in an experiment

Event- collection of outcomes

Favorable outcome-outcomes corresponding to an event

Probability- the likelihood of an event to occur

Theoretical probabilities- are probabilities using mathematical reasoning

Experimental probabilities- are probabilities based on trials of an experiment

Markup- difference between retail and wholesale price

Discount- difference between regular price and sale price

Percent of change- new amount – original amount over the original amount

Interest- money paid for the use of money

Principal- the amount you borrow or deposit

Interest rate- percent of increase in the principal

Simple interest- interest is paid only on the principal

Compound interest- interest paid on the principal and on the previously earned interest