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1.3 Coordinate geometry in the (x, y) plane

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Question 30

The line $l_1\,$ has equation $2 y + 4 x + 7 = 0$

The line $l_2\,$ has equation $y = m x + 4$ , where $m\,$ is a constant.

Given that $l_1\,$ and $l_2\,$ are perpendicular.

a.

Find the value of $m$ .

[2]

b.

Find the coordinates of the point where $l_1\,$ and $l_2\,$ meet.

[3]

1.3 Coordinate geometry in the (x, y) plane Questions

A Level
Maths
1.3 Coordinate geometry in the (x, y) plane