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Which equation represents the line that passes through the points (-3, 7) and (9,-1)?

A- y= -2/3x+5
B- y= -2/3x-7
C- y= 2/3x-7
D-y= 2/3x+5

User Artyomska
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1 Answer

4 votes

Final answer:

The equation that represents the line passing through the points (-3, 7) and (9, -1) is y = -2/3x + 5. This is achieved by finding the slope of the line and applying the point-slope formula using one of the points to get the equation in slope-intercept form.

Step-by-step explanation:

The equation of the line passing through the points (-3, 7) and (9, -1) can be found by calculating the slope (m) and using the point-slope form of the equation of a line. The slope is calculated as:

m = (y2 - y1) / (x2 - x1) = (-1 - 7) / (9 - (-3)) = -8 / 12 = -2 / 3

Using one of the points (-3, 7) and the slope we can plug them into the point-slope formula: y - y1 = m(x - x1). This gives us:

y - 7 = (-2 / 3)(x - (-3))

Expanding and simplifying, we get: y = (-2 / 3)x - 2 + 7

Finally, y = (-2 / 3)x + 5, which matches option A.

User Martin Kearn
by
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