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slope-intercept form y=mx+b linear extrapolation -The use of a linear equation to predict values that are outside the range of data. :) point-slope form ...the equation y-y1=m(x-x1), (x1,y1) is a given point on a nonvertical line and m is the slope parallel lines ...lines that never intersect! perpendicular lines ...lines that form a right angle scatter plot ...shows the relationship between a set of data with two variables, graphed as ordered pairs on a coordinate plane. line of fit ...A line that describes the trend of the data in a scatter plot linear interpolation ...Linear equation to predict values inside the data range......... best-fit line ...complex algorithms that find a more precise line of fit. linear regression ...an algorithm to find a precise line of fit for a set of data correlation coefficient ...a value that shows how close data points are to a line median-fit line line that can be found using a graphing caculator step function ...series of line segments piecewise function when each part of a step functions linear greatest integer function ...A step function, written as f(x)=[x], where f(x) is the greatest integer less than or equal to x coefficient ...the numerical factor of a term function a relation in which each element of the domain is paired with exactly one element of the range ratio a comparison of two numbers