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Mathematics 16 Online
OpenStudy (anonymous):

Using complete sentences, explain how to graph y = 1/2 x - 3 using the slope-intercept method

OpenStudy (anonymous):

hello?

OpenStudy (jhannybean):

start with your y-intercept -3, you know that this is an increasing function because the slope is positive. |dw:1370994972777:dw| your slope tells you which direction your graph is increasing and taking your slope, you can graph the line that way xD Another way is to start at your y-intercept, -3, and then look for your x-intercept and connect the two points, making sure your slope is increasing up by 1, and over by 2. in order to find our x-intercept, we make y=0. \[\large y= \frac{1}{2}x-3\]\[\large 0 = \frac12 x - 3\]\[\large 3 = \frac12 x\]\[\large 3(2) = \frac12 (2) x\]\[\large x=6\] Now plotting the x and y-intercepts, we can conclude that the line has a slope of 1/2, meaning from either intercept. (x or y) you can go across 2 units, and down 1 to end up at your next point. The graph will also pass through the points x=6 and y=-3

OpenStudy (jhannybean):

|dw:1370995376496:dw|

OpenStudy (anonymous):

thank you!

OpenStudy (precal):

up 1 and right 2 for the slope

OpenStudy (anonymous):

ok thanks

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