# point-slope form. what we know so far…. slope intercept form where m is the slope and b is the...

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Point-Slope Form

What we Know so far.Slope Intercept FormWhere m is the slope and b is the intercept

What we Know so far.SlopeWhere two points are given as (x1,y1) and (x2,y2)

Where did this formula come from?

The New Stuff Write equations Slope-intercept form is:Where m is the slope and b is the y-interceptExample: Find the equation of the line with slope -2 and y-intercept 8y = -2x + 8Easy if I know the y-intercept but if I dont?

The New Stuff Point- Slope FormPoint- Slope form is:Where m is the slope and (x1,y1) is the given point that the line goes through

The New Stuff Point- Slope FormPoint- Slope form is:Where does this equation come from?

Using Point-Slope Form to graphPoint is (2,3)Slope is

Manipulate Point-Slope Form to Slope-Intercept formSimplify

Using Point-Slope Form to graphPoint is (4,-3)Slope is

Manipulate Point-Slope Form to Slope-Intercept form

Your turn

Homework

Pg. 304 #2 to 8 evenWrite slope and pointPlot graphWrite equation in slope intercept form