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Which equation represents the line through the points (1, −1) and (3, 5)?
A3x − y + 4 = 0
B3x − y − 4 = 0
Cx − 3y − 4 = 0
D3x + y − 4 = 0
Answer & Solution
Correct answer: B. 3x − y − 4 = 0
The slope is 6/2 = 3, so y + 1 = 3(x − 1), giving 3x − y − 4 = 0.
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