Question 10073: I need to find the equation for this. This is what they gave me
(-2,-5) (-1,-3) (0, -1) (1, 1) (2, 3)
Please help me
Answer by longjonsilver(2297)   (Show Source):
You can put this solution on YOUR website! x: -2 -1 0 1 2
y: -5 -3 -1 1 3
OK, look at the y-values...increasing by 2 every time... this is the 2-times table, just "moved a little" ie 2,4,6,8,10.
so we have y=2x... the 2-times table. However, if x=0 (for example), y=2x gives y=0 in this situation, but our question says y should equal -1, so how about y=2x-1?
check...
if x=-2, then y=2(-2)-1 --> y=-4-1 --> y=-5.
Looks to be correct :-)
jon.
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