Straight Lines

The general equation of a straight line is:

1. ax² + bx + c = 0
2. ax + by + c = 0
3. y = x²
4. xy = 1

The equation of the x-axis is:

1. x = 0
2. y = 0
3. x = y
4. x + y = 1

The slope of the line 3x + 2y - 6 = 0 is:

1. 3/2
2. -3/2
3. 2/3
4. -2/3

If two lines have slopes m₁ and m₂, they are perpendicular when:

1. m₁ = m₂
2. m₁ + m₂ = 0
3. m₁m₂ = -1
4. m₁m₂ = 1

The intercept form of the equation of a line is:

1. y = mx + c
2. x/a + y/b = 1
3. y - y₁ = m(x - x₁)
4. ax + by + c = 0

The slope of a line perpendicular to a line with slope m is:

1. m
2. -m
3. -1/m
4. 1/m

The equation of a line passing through (x₁, y₁) with slope m is:

1. y = mx + c
2. y - y₁ = m(x - x₁)
3. ax + by + c = 0
4. x/a + y/b = 1

The angle of inclination of a line with positive slope is:

1. Obtuse angle
2. Acute angle
3. Zero angle always
4. 180°

The slope of two parallel lines is:

1. Different
2. Equal
3. Zero always
4. Undefined always

The distance between two points (x₁, y₁) and (x₂, y₂) is:

1. √[(x₂-x₁)²+(y₂-y₁)²]
2. (x₂-x₁)+(y₂-y₁)
3. x₁x₂+y₁y₂
4. √(x₁²+y₁²)

The slope-intercept form of a straight line is:

1. ax + by + c = 0
2. y = mx + c
3. x/a + y/b = 1
4. y - y₁ = m(x - x₁)

The equation of a vertical line passing through (3, 5) is:

1. y = 3
2. x = 3
3. x = 5
4. y = 5

The equation of a line parallel to the x-axis is:

1. x = a
2. y = a
3. y = mx + c
4. x + y = 0

The slope of the line passing through points (2, 3) and (4, 7) is:

1. 1
2. 2
3. 3
4. 4

The slope of a horizontal line is:

1. 1
2. 0
3. Undefined
4. Infinity