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​Q5: Answers – Paper 6 – June 2018

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Content:

• Part A) Finding the Equation of a Line – 2 Points
• Part B) Finding the Equation of a Quadratic from a Graph (example 2)
• Part C) Types of Triangles​

Quizzes:

• Part A) Finding the Equation of a Line – 2 points
• Part B) Finding the Equation of a Quadratic from a Graph (question 5 & 6)
• Part C) Types of Triangles

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Question

5) The diagram shows a straight line that passes through points A and B, and a curve that passes through points P and Q.

a) Find the equation of the straight line. 

[3 marks]
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b) The equation of the curve is y = x² + kx + 8.

Find the value of k.

[3 marks]

c) Diann draws line BQ.
​She says

"Triangle ABQ is isosceles."

Is Diann correct?
You must show all your working.

[4 marks]

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