| A | B |
|---|
| ratio | a comparison of two numbers by division |
| proportion | an equation stating that two ratios are equal |
| extremes | the cross product ad |
| means | the cross product bc |
| cross products | the products of the terms on the diagonals |
| scale | a ratio used when making a model |
| rate | in a proportion, the fraction with a denominator of 100 |
| percent | a ratio that compares a number to 100 |
| percentage | the number that is divided by the base in a percent proportion |
| base | the number that is divided into the percentage |
| simple interest | the amount paid or earned for the use of money |
| I | =prt |
| p | =principal |
| r | =rate |
| t | =time in years |
| percent of decrease | the ratio of an amount of decrease to the prvious amount (as a percent) |
| percent of increase | the ratio (as a percent) of an amount of increase to the previous amount |
| probability | the ratio that tells how likely it is that an event will take place |
| probability of an event | a ratio of the number of ways a certain event can occur to the number of possible outcomes |
| random | when an outcome is chosen without any preference |
| equally likely | outcomes that have an equal chance of occuring |
| impossible | p=0 |
| certain | p=1 |
| odds | the ratio of the successes to the failures |
| successes | number of ways the event can occur |
| failures | number of ways the event cannot occur |
| direct variation | an equation of the form y = kx |
| inverse variation | an equation of the form xy = k |
