Which of these lines passes through the point (−1, −1)?

Class 9Linear Equations in Two VariablesLinear Equations

Step-by-Step Solution

3(−1) − 2(−1) + 1 = −3 + 2 + 1 = 0 ✓. The others give −2, −1 and 0 where 2, 3 and 2 are needed. Take care with the double negative −2(−1) = +2.

Answer: A)

3 x - 2 y + 1 = 0

x

-axis**: every point on the

x

-axis has

y = 0

. So the

x

-axis is the line **

y = 0 * * . * * y

-axis**: every point on the

y

-axis has

x = 0

. So the

y

-axis is the line **

x = 0

**.

These are special cases of 'lines parallel to the axes' — except they ARE the axes themselves.

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