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Devon wants to write an equation for a line that passes through 2 of the data points he has collected. The points are (8, 5) and (–12, –9). He writes the equation. 7x – 10y = 3. Is this a good model? Explain your reasoning.

Respuesta :

meerkat18
Use slope formula to find slope −9−5−/12−8=−14/−20=7/10 7/10 = m = slope  
y= mx + b
y= (7/10)x + b
(8,5)
(5) = (7/10)(8) + b
b = -3/5

So.... y=(7/10)x −35

 multiply by 10

10y=7x−6 --> -7x + 10y = -6
 --> 7x - 10y = 6
 So, if 7x - 10y = 3 a good model?

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