M.A18.21

Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear. (e.g., The function A = s^2 giving the area of a square as a function of its side length is not linear because its graph contains the points (1,1), (2,4) and (3,9), which are not on a straight line.)

Khan Academy Resources

Writing slope-intercept equationsIntro to slope-intercept formGraphing slope-intercept formGraphing lines from slope-intercept form reviewSlope-intercept form reviewIntercepts from an equationSlope-intercept introSlope-intercept from two pointsGraph from slope-intercept formSlope-intercept equation from graphLinear & nonlinear functionsSlope-intercept equation from graphRecognizing linear functionsIntercepts from an equationWorked example: intercepts from an equationGraph from slope-intercept equationConverting to slope-intercept formSlope-intercept equation from slope & pointSlope-intercept equation from two pointsLinear & nonlinear functions: tableIntro to slope-intercept formLinear & nonlinear functions: missing valueSlope-intercept form from a tableLinear & nonlinear functions: word problem

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