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 2 years ago
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
 2 years ago
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

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

ihatealgebrasomuch
 2 years ago
Best ResponseYou've already chosen the best response.0dw: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

oldrin.bataku
 2 years ago
Best ResponseYou've already chosen the best response.1If 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. \[m=\frac{101}{12}=\frac{9}{3}=3\\ yy_0=m(xx_0)\\ y10=3(x1)\\ 10=3x3y\\ 3xy=7 \]
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