i am stumpted on a question , about what an equation would be for an x y chart any body who thinks they can help?

Question

saifoo.khan · Answer

is that related to Linear Law?

anonymous · Answer

im not quite sure its new to me , i could give you the numbers for the chart?

oaktree · Answer

Are you talking about equations of the form y=mx+b?

anonymous · Answer

yes

oaktree · Answer

OK, give me the numbers.

saifoo.khan · Answer

if you have a chart, you can post a photo here or use the draw tool to draw.

oaktree · Answer

Just give me two points on the line, or a point and the slope.

anonymous · Answer

x, 0, 1,  2,   3,   4,    5,     6,     7,      8
y, 0, 3, 12, 33, 72, 135, 228, 375, 528

oaktree · Answer

Wow. OK, I only needed two.

oaktree · Answer

Let's start with finding the slope, or the "m" part of y=mx+b

oaktree · Answer

So, m=$$(y _{2}-y_{1})/(x_{2}-x_{1})$$

anonymous · Answer

how did you get that tho

oaktree · Answer

Where two points are $$(x_{2},y_{2}) and (x_{1}, y_{1})$$

oaktree · Answer

Oh, that's just a theorem.

oaktree · Answer

Good so far?

anonymous · Answer

not at all 
im not suposed to graph i am just supposed to guess using the chart

oaktree · Answer

No, we're not graphing. We're solving for the slope and the y-intercept, so that we'll have an equation like y=5x-3.

oaktree · Answer

OK?

oaktree · Answer

Well, thanks for leaving in the middle. The answer is y=(1/5)x+(14/5).