9th Class Mathematics Chapter 8 Test08. Geometry of Straight Lines

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. If slopes of two lines are m₁ and m₂, then tan θ is:
   1. (m₂−m₁)/(1+m₁m₂)
   2. (m₁+m₂)/(1−m₁m₂)
   3. m₁m₂
   4. m₂/m₁
2. Slope of the line joining (−2, 4) and (1, −3) is:
   1. $-\frac{7}{3}$
   2. $\frac{7}{2}$
   3. $-\frac{3}{7}$
   4. $\frac{1}{7}$
3. A constant rate of change in a situation is represented graphically by a:
   1. Circle
   2. Straight line
   3. Parabola
   4. Triangle
4. The equation 5x − 6 = 0 represents a line parallel to the:
   1. x-axis
   2. y-axis
   3. Line y = x
   4. Origin
5. Slope-intercept form of a straight line is:
   1. y = mx + c
   2. ax + by = 1
   3. x/a + y/b = 0
   4. y − y₁ = x − x₁
6. Point of intersection of lines 9x - 7y = 0 and 8x - 11y = 0, is.
   1. ( 0 , 0 )
   2. ( 0 , 7 )
   3. ( 9 , 0 )
   4. ( 7 , 9 )
7. The line y = 5x - 3 is written in the form.
   1. point - slope
   2. two - intercept
   3. slope - intercept
   4. two - point
8. The equation y = 0 represents the:
   1. x-axis
   2. y-axis
   3. Origin
   4. Vertical line x = 0
9. The slope of a line having inclination θ is:
   1. sin θ
   2. cos θ
   3. tan θ
   4. cot θ
10. A linear model is appropriate when the rate of change is:
    1. Constant
    2. Random
    3. Always zero
    4. Exponential