Which of the following points is the intersection between the lines...

[BTGmoderatorLU]

Source: Princeton Review

Which of the following point is the intersection between the lines y=3x+6 and y=-2x-4?

A. (2, 0)
B. (0, -2)
C. (-2, 0)
D. (0, 2)
E. (1, 5)

The OA is C

[Jay@ManhattanReview]

Source: Princeton Review

Which of the following point is the intersection between the lines y=3x+6 and y=-2x-4?

A. (2, 0)
B. (0, -2)
C. (-2, 0)
D. (0, 2)
E. (1, 5)

The OA is C

Given that y = 3x + 6 and y = –2x – 4, we have 3x + 6 = –2x – 4 => x = –2

Thus, from y = 3x + 6 and x = – 2, we have y = 0.

The correct answer: C

Hope this helps!

-Jay
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[Scott@TargetTestPrep]

Source: Princeton Review

Which of the following point is the intersection between the lines y=3x+6 and y=-2x-4?

A. (2, 0)
B. (0, -2)
C. (-2, 0)
D. (0, 2)
E. (1, 5)

The OA is C

We can set the right hand side of the two equations equal to each other (since they are both equal to y):

3x + 6 = -2x - 4

5x = -10

x = -2

We see that x = -2 must be the x-coordinate of the intersection point, and since only choice C has -2 as the x-coordinate, it must be the correct answer.

Answer: C