#### Slope of vertical line is …………….

#### L, is vertical iff m = ……………..

#### Two lines are perpendicular If 1 + m1 m2 = ………………..

#### Y- intercept of the line 5x + √ 5 y + √ 5 = 0 is ……..

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#### If slope of AB = Slope o BC then A, B and C are………..

#### Gradient of horizontal line is………

#### Slope of the line 2y + x + 3 = 0 is ……..

#### Equation of x – axis is ………..

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#### Two lines l1 and l2 with slopes m1 and m2 are parallel if m1 – m2 =……

#### L, is horizontal iff m =……………

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