| A | B |
|---|
| line of best fit | most accurate trend line on a scatter plot |
| value of r | -1 to 1 |
| r | correlation coefficient |
| linear inequality | a mathematical sentence that describes a region of the coordinate plane have a boundary line |
| solution of an inequality (2 variables) | any ordered pair that makes the inequality true |
| constant of variation for direct variation | nonzero contant k in the function y=kx |
| slope | rate of change |
| slope | ratio of the vertical change to the horizontal change |
| linear equation | equation whose graph forms a straight line |
| y-intercept | the y-coordinate of the point where a line crosses the y-axis |
| slope-intercept form | linear equation written as y = mx + b |
| standard form | linear equation Ax + By = C |
| x-intercept | the x-coordinate of the point where a line crosses the x-axis |
| point-slope form | linear equation written as y - y1 = m(x - x1) |
| parallel lines | two lines in the same plane that never intersect |
| perpendicular lines | two lines that intersect to form right angles |
| negative reciprocal | the product of a number and this is -1 |
| absolute value equation | an equation whose graph forms a V that opens up or down |
| translation | This shifts a graph horizontally, vertically or both |
| equivalent inequalities | these have the same set of solutions |
| compound inequalities | two inequalities that are joined by the word "and" or the word "or". |
| rate | a ratio of a to be where a and b represent quantities measured in different units |
| unit analysis | the process of selecting conversion factors to produce the appropriate units |
| proportion | an equation that states that two ratios are equal |
| extremes of a proportion | in the proportion a/b = c/d, a and d |
| means of a proportion | In the proportion a/b = c/d, b and c |
| similar figures | Figures that have the same shape, but not necessarily the same size. |
| scale drawing | an enlarged or reduced drawing similar to an actual object or place |
| scale | the ratio of a distance in a drawing to the actual distance |
| percent of change | the ratio of the amount of change to the original amount expressed as a percent |
| greatest possible error | one-half of the measuring unit, for any measurement |
