Initial Diagnostic Audit - Unit G2: Straight Lines
Section G2.1 - Gradient

What is the gradient of each of the lines shown below?

Where gradient values are not integers, input as a decimal, given correct to 2 d.p. where appropriate

1. Line A Gradient =
2. Line B Gradient =
3. Line C Gradient =
4. Find the gradient of the line that joins the points with coordinates (2, -2), (-6, 2).
Gradient =
5. Find the missing coordinate to ensure that AB is parallel to CD when points A, B, C and D have coordinates
A (1, 2),  B (6, 7),  C (3, 6) and D (8,)
Section G2.2 - Gradients of Perpendicular Lines

Where gradient values are not integers, input as a decimal, given correct to 2 d.p. where appropriate

6. What is the gradient of the line perpendicular to the line segment joining A (4, 7) to B (7, 3)?
Gradient =
7. In each case, decide whether the lines AB and PQ are parallel, perpendicular or neither.

(a) A (-2, 0), B (1, 9), P (2, 5), Q (6, 17)   

(b) A (3, 1), B (7, 3), P (-3, 2), Q (1, 0)   

8. A triangle has vertices A (3, 1), B (7, 5) and C (1, 3). Find the gradient of each side.
(a) Side AB
(b) Side AC
(b) Side BC
(d) Is this a right-angled triangle?
Section G2.3 - Application of Graphs
9. The graph shows the distance-time graph for a bicycle journey.

(a) What is the speed of the bike in the first 20 seconds? m/s
(b) For how long is the bicycle stationary? s
(c) What is the speed of the bicycle between points B and C? m/s

10. The graph shows the speed-time graph for a car journey.

(a) What is the car's acceleration during the first 20 seconds? m/s2
(b) What distance does the car cover in the first 80 seconds? m

Section G2.4 - The Equation of a Straight Line

Where gradient values are not integers, input as a decimal, given correct to 2 d.p. where appropriate

11. What is the equation of the straight line with gradient 2 and intercept -3?
y = x +
12. For the straight line with equation 2y = x - 3, what is its gradient and intercept?
Gradient = , Intercept =
13. What is the equation of the straight line illustrated below?

y = x +

14. The point with coordinates (2, 5) lies on the line y = 2x + 1.
(a) What is the gradient of the perpendicular line that also passes through this point?
(b) What is the equation of this perpendicular line?
y = x +

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Produced by Russell Geach for CIMT - December 2013