| A | B |
|---|
| best-fit line | the line that most closely approximates the data in a scatteer plot |
| constant of variation | the number k in equations of the form y=kx |
| direct variation | an equation of the form y=kx , where k does not equal 0 |
| family of graphs | graphs and equations of graphs that have at least one characteristic in common |
| linear extrapolation | the use of a linear equation to predict value that are outside the range of data |
| linear interpolation | the use of a linear equation to predict values that are outside of the data range. |
| line of fit | a line that describes the trend of data in a scatter plot |
| negative correlation | in a scatter plot, as x increases, y decreases |
| parallel lines | lines in the same plane that never insect and have the same slope |
| parent graph | the simplest of graphs in a family of graphs |
| perpendicular lines | lines that meet to form right angles |
| point-slope form | an equation of the form y-y1= m(x-x1), where m is the slope and (X1,Y1) is a given point on a nonvertical line. |
| positive correlation | in a scatter plot, as x increases y increases |
| rate of change | how a quanity is changing over time |
| scatter plot | to sets of data plotted as order pairs on a data plane |
| slope | the ratio of change in the y-coordinates (rise) to the corresponding change in the x-coordinates (run) as you move from one point to another along a line |
| slope-intercept form | an equation of the form y=mx+b, where m is the slope and b is the y-intercept |
