Question 911371: I have to find the equation of 2 points (2, 90) and (4, 810)
We have not learned how to do the formula, we have only learned to divide one y value by its previous but in this case that doesn't work. How can I solve it non-algebraically?
Found 2 solutions by stanbon, Alan3354:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! find the equation of 2 points (2, 90) and (4, 810)
We have not learned how to do the formula, we have only learned to divide one y value by its previous but in this case that doesn't work. How can I solve it non-algebraically?
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Notice that when x increased by 4-2 = 2, y increased by 810-90 = 720
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So if x were to increase by 1, y would increase by 360.
That is the slope of the equation you want.
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Notice that if x were to DECREASE by 2, 2-2 = 0, y would decrease by 720
So y would equal 90-720 = -630.
That is the y-intercept of the equation you want.
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Ans:: y = 360x - 630
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Cheers,
Stan H.
Answer by Alan3354(69443)  (Show Source):
You can put this solution on YOUR website! I have to find the equation of 2 points (2, 90) and (4, 810)
We have not learned how to do the formula, we have only learned to divide one y value by its previous but in this case that doesn't work. How can I solve it non-algebraically?
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There is no "equation of 2 points."
Maybe you mean an equation of the straight line that passes thru the 2 points.
If so,
find the slope, m = diffy/diffx = (810 - 90)/(4 - 2) = 360
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then use y - y1 - m*(x - x1) and either point to find an equation.
y - 90 = 360*(x - 2)
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Idk what you mean by "solve it non-algebraically." Using a ouija board?
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