| A | B |
|---|
| coordinate plane | A plane formed by two perpendicular numbered lines called axes. |
| domain | The set of the first elements of a relation: In the relation {(2,20), (3,30)}, the domain is {2, 3}. |
| function | A relation in which each element in the domain is matched with only one element of the range: [(1,4) (2,5)] is a function, but [(1,4) (2,4)] is not because the same y value is shared by different x values. |
| function rule | a |
| line of best fit | A straight line used as a best approximation of all the points in a scatter-plot graph. |
| linear equation | An equation that can be represented by a straight line on the coordinate plane. |
| negative correlation | In a scatterplot, a pattern formed from data points shows the values of one variable increase as the values of the other variable decrease. |
| no correlation | In a scatterplot, data points are scattered, and no pattern can be formed from the points, a correlation of "0" |
| ordered pair | A pair of numbers used to locate a point on a coordinate plane: (3,2) represents 3 spaces to the right of zero and 2 spaces up. |
| origin | The point on the coordinate plane where the x-axis and the y-axis intersect, (0,0). |
| positive correlation | When values of two sets of data increase together. |
| quadrant | One of the four regions of the coordinate plane. |
| range | The difference between the greatest and the least numbers in a set of data: The range is 13 because 83-70=13. |
| relation | A set of ordered pairs: (5,1) (10,2) (15,3). |
| scatter plot | A graph with points plotted that attempt to show a relationship between two variables. |
| slope | The measure of the steepness of a line; the ratio of vertical change (rise) to horizontal change (run). |
| slope-intercept form | A linear equation in the setup of y=mx+b. |
| solution | The value that makes two sides of an equation equal: y+7=9; 2 is the solution. |
| system of linear equations | Two or more equations that involve two or more variables: y=2x–1 and y=x+1 |
| vertical line test | If a vertical line crosses two or more points on the graph, the relation is not a function. |
| x-axis | The horizontal axis on the coordinate plane. |
| x-coordinate | The first number in an ordered pair: (3, 2) 3 is the x-coordinate |
| x-intercept | The point where a function line crosses the x-axis. |
| y-axis | The vertical axis on the coordinate plane. |
| y-coordinate | The second number in an ordered pair: (3, 2) 2 is the y-coordinate. |
| y-intercept | The point where a function line crosses the y-axis. |
