Unit 2 - Ratios & Proportions Vocabulary

3. the ratio between two directly proportional quantities; denoted as a k which is the ratio of y/x.
6. the amount of money paid or earned for the use of money by a bank or other financial institution; formula is I=prt.
9. the amount added to the original price.
10. a percentage paid or earned for services.
12. the ratio of size of the model to the actual size; ratio is model/actual.
13. a method to solve proportions by multiplying diagonals and setting them equal to each other.
15. ratios that have the same value; when simplified.
17. a measure of how one quantity changes in relation to another; ratio of the change in y-value to the change in x-value.
21. an equation stating that two ratios are equal.
22. a ratio expressed as a fraction of 100; often represented by the symbol %.
23. a positive percent of change.
24. an equivalent form of the percent proportion in which the percent is written as a decimal.
25. a comparison of two quantities.
27. a negative percent of change.
28. when part of the original figure matches up with part of a copy. These could be points, segments, angles or distances.
29. a percentage added to the the selling price.

1. a relationship where ratios between quantities are constant or equal; represented by the equation y=kx.
2. tells how the measurements in a scale drawing represent the actual measurements of the object.
4. added to the total bill.
5. using the properties of similar triangles to find measurements that are difficult to measure directly.
7. used to represent an object that is too big or too small to be shown in its actual size; the dimensions of the object is proportional to the dimensions of the actual object.
8. the amount subtracted from the original price.
11. figures that have the same shape, but different sizes; sides are proportional & angles are equal.
14. the ratio of corresponding lengths in similar figures; it is used to enlarge or reduce similar shapes
16. graph will not pass through 0,0; no constant of proportionality
17. a ratio that compares two different kind of quantities.
18. one ratio or fraction that compares part of a quantity to the whole quantity; the other ratio is equivalent percent written as a fraction with a denominator of 100.
19. a ratio that compares the change in a quantity to the original amount.
20. a rate with a denominator of 1.
26. a copy of a figure where every length in the original figure is multiplied by the same number.