flyinglikeabird?
Write the equation of the line in Slope-Intercept form, Then graph the equation by using either the slope-intercept equation or by using x- and y-intercepts. The line contains points (3, 5) and (3, 8).
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flyinglikeabird?
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I have already did this problem, just need to make sure I have done it right. 0 is the slope obviously because the line is always on the x-axis.
CalebBeavers
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Slope is undefined, which means its a vertical line. So the equation is gonna be x=whatever the x coordinate always is. In this case x=3
flyinglikeabird?
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Ahh, okay. Thanks, that's all I needed.
CalebBeavers
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You're welcome
flyinglikeabird?
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I have one more problem like this. Can you help me through it?
CalebBeavers
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Yep.
flyinglikeabird?
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Alright, thanks. Here it is. The line contains points (2, -1) and (0, 4).
CalebBeavers
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And you want slope intercept form?
flyinglikeabird?
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Yes, same as the others.
CalebBeavers
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Alright, well if you notice, one of your points is the y intercept. So if we find the slope we can just plug those in and were done.
flyinglikeabird?
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Slope is -2
CalebBeavers
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You should have got -5/2
flyinglikeabird?
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Hmmm, trying again one min.
flyinglikeabird?
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Ahh, okay. Gothcha.
CalebBeavers
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Alright, slope intercept form is y=mx+b where m=slope and b=y coordinate of the y intercept. So plug those in and what do you get?
flyinglikeabird?
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2 = -5/2-1 + 2 or something like that....
CalebBeavers
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No, all you have to plug in is m and b.
y=-5/2x+4
flyinglikeabird?
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Oh...yeah. heh I'm always gettin the steps mixed up.
CalebBeavers
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Yep. So now you're done and thats your answer. Understand how to do it now?
flyinglikeabird?
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Well yes and no. I'll most likely forget anyway.