Chapter 8 Rectangular Cartesian Coordinates

A (3,4) and B(5,10). The gradient of the line AB is ---

• -3

• 3

If m₁ = m₂ then the two lines are

• parallel

• perpendicular

• horizontal

• vertical

If the two lines are perpendicular, then

• m₁ = m₂

• m₁ = -m₂

• m₂ = -1/m₁

• m₁ × m₂= -1

The equation of the line passing through

(1,6) and (2,3) is

• y= -3x + 9

• y = 3x + 9

If a line has gradient of 4 and y intercept (0,-2), the equation is

• y = x-2

• y= 4x+2

• x =4y -2

• y=4x-2

• y=-2x+3

• y=2x+3

A (3,-7) and C (-2,5), the length of AC is

• 5

• 13

• parallel

• perpendicular

• neither

• horizontal