**TI83F* AppVariable file 03/21/07, 14:18R AGLA104A?nav 868E89BEB1644A6EA4327E33887122BEGLA104.GLA1041   best-fit lineRbest-fit line:ÖThe line that most closely approximates the data in a scatter plot. constant of variationGconstant of variation:ÖThe number k in an equation of the form Öy = kx. direct variation>direct variation:ÖAn equation of the formÖy = kx, where k  0. family of graphsafamily of graphs:ÖGraphs and equations of graphs that have at least one characteristic in common. negative correlationEnegative correlation:ÖIn a scatter plot, as x increases, y decreases. parallel linesµ!Uparallel lines:ÖLines in the same plane that never intersect and have the same slope.  parent graphSparent graph:ÖThe simplest of the graphs or the anchor graph in a family of graphs. perpendicular linesž!aperpendicular lines:ÖLines which meet to form right angles and whose slopes have a product of -1.  point-slope formˆpoint-slope form:ÖAn equation of the form Öy - y1 = m(x - x1), where m is the slope and (x1, y1) is a given point on a nonvertical line.  positive correlationEpositive correlation:ÖIn a scatter plot, as x increases, y increases.  rate of change3rate of change:ÖThe change in a quantity over time.   scatter plotû !Sscatter plot:ÖA graph that shows the general relationship between two sets of data.  slopeX !¥slope:ÖThe ratio of the 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 formhslope-intercept form:ÖAn equation of the formÖy = mx + b, where m is the slope and b is the y-intercept.8`0€ ÿÿÿÿÿÿÿÿÿÿþ0€ 0€ ÿÿÿÿÿÿÿÿÿÿþ0€ 8`! q øà !Àp 0 Ð < p80 À < à0 Àp RÀ ’ à2 ’ Â Œ c ü@žyçŸðªXf@ ଒Š@ ¨’Š@ Fše  0  È ‚ ÿÿÿÿÿÿÿÿÿÿþ  Ž €  0à Á43€"#FR›!RlERª J`ñÀà5*™„I@ ñ J2aÀ0  ! 0!ÀÀ ÎyÎsœæ 0$\€€Á€$1ÌÌ€@&JI*”€,À%JQ*”€0@u2\ÊÊ@8@ € †`P ÊS`øªU@p¥S0 8`HH>8p <<€ € € ƒÀ ƒÃÌ0 ÃÁžx Á€x € 0ˆ€0ÈÀx€ÈÀxÀˆ€0ÀÁ€`àðàðÀ``Èð`<èðð<è`ðÈ`@Àÿÿÿÿÿÿÿÿ€À€@È€(<(<(È>8`€À ÿ@`ÿÿÿÿÿÿð`@À€Èú