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Example Questions
Example Question #2 : Lines
Which line passes through the points (0, 6) and (4, 0)?
Possible Answers:
y = 1/5x + 3
y = –3/2x + 6
y = 2/3 + 5
y = –3/2 – 3
y = 2/3x –6
Correct answer:
y = –3/2x + 6
Explanation:
P1 (0, 6) and P2 (4, 0)
First, calculate the slope: m = rise ÷ run = (y2 – y1)/(x2 – x1), so m = –3/2
Second, plug the slope and one point into the slope-intercept formula:
y = mx + b, so 0 = –3/2(4) + b and b = 6
Thus, y = –3/2x + 6
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