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Solmyr
Group Title
What is the equation of the line that passes through the points (−2, 1) and (1, 10)?
3x − y = −7
3x − y = −5
3x − y = 5
x + 3y = −5
 one year ago
 one year ago
Solmyr Group Title
What is the equation of the line that passes through the points (−2, 1) and (1, 10)? 3x − y = −7 3x − y = −5 3x − y = 5 x + 3y = −5
 one year ago
 one year ago

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dpaInc Group TitleBest ResponseYou've already chosen the best response.0
plug those points into each equation and see which one holds true.
 one year ago

ihatealgebrasomuch Group TitleBest ResponseYou've already chosen the best response.0
dw:1350777908333:dw you coud graph it, or get the slope > 101/12 (or 1+2) and get 9/3 which is 3 so the slope is 3. Plug in the #s to the point slope equation y1=3(x+2) and simplify to y1=3x+6 and get y=3x+5 and put it into standard form 3x+y=5 and then multiply everything by 1 to get 3xy=5, so the second answer is correct! TAH DAH, MATH
 one year ago

oldrin.bataku Group TitleBest ResponseYou've already chosen the best response.1
If you need a fast solution, yes, just test the equalities at each point. However, if you want to be more careful, you can just derive the equation of the line in question. \[m=\frac{101}{12}=\frac{9}{3}=3\\ yy_0=m(xx_0)\\ y10=3(x1)\\ 10=3x3y\\ 3xy=7 \]
 one year ago
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