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Post by calico on Nov 14, 2006 14:39:06 GMT -8
Ok, so here's the deal: I was out sick from school a few days ago, and my algebra 1 class learned something new. Well my teacher wasnt there to explain it to me and i have no idea how or what to do. I spent 4 hours last night looking for an example problem on the internet but i can't seem to find one.
so if someone could walk me through how to do this ill clean their shoes.
Directions: write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of each equation
y = -1/2x + 1 ; (4, 2)
easy for most of you i know, but im bad at math
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Post by Zangief on Nov 14, 2006 14:49:55 GMT -8
Equation of a line for point and slope given (point slope form) =
y - y1 = m(x-x1) where m = slope, (x1, y1) = point given
parallel means that they have the same slope. So plug in the point (4, 2) into the equation I gave, and the slope will be the same from the given equation.
Y intercept form =
y = mx + b where m = slope, b = y intercept
Now lets solve
Slope of new line = slope of given line = m = -1/2
equation of new line based on point given
y - 2 = -1/2(x-4)
re-arrange into slope intercept form
y = -1/2(x - 4) + 2
y = -1/2x + 2 + 2
y = -1/2x + 4
and there is your answer
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Post by calico on Nov 14, 2006 14:51:12 GMT -8
thanks, now i can finish this without hell.
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Post by Dana :D on Nov 14, 2006 15:39:27 GMT -8
gaw....i wish my math was that easy again....
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Post by Nobody on Nov 14, 2006 22:15:24 GMT -8
I wish that too. I hate optimization, but i felt the same about related rates, but now i can do all of the related rate problems in my book. i win.
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Post by lx Spooner xl on Nov 15, 2006 1:09:06 GMT -8
i miss easy math like that....good think i dont have to do it anymore.mwahaha
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Post by Dana :D on Nov 15, 2006 16:12:04 GMT -8
i know now its derivitives, and obliques, and points of inflection
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Post by Zangief on Nov 15, 2006 16:16:39 GMT -8
and in case anyone is wondering...I use coordinate system stuff all the time at work. Everyone always wonders when they would need to use all that "pointless" math that they learned in school. I can speak for engineers, we use it all the time.
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Post by Nobody on Nov 15, 2006 18:50:06 GMT -8
Yay for pointless math.
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Post by Dana :D on Nov 17, 2006 15:59:51 GMT -8
damn you pointless math!! not being so pointless after all!! *shakes fist at math*
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