Pearson Edexcel International GCSE (9–1) · MATHEMATICS A · Chapter
Graphs 6
18 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →A company models the cost, $C, in dollars, of producing x batches of items by the equation below. \[ C = \frac{1800}{x} + 70x \] For what value of x is the cost C minimized (to the nearest whole number)?
Question 2
4 marks · Hard
Answer and see the solution →The function is to be plotted for .
Complete the table below by calculating the value of y for each value of x.
x y -2 -1 0 1 2 Question 3
4 marks · Hard
Answer and see the solution →Consider the algebraic form of a reciprocal equation.
(a)[1 mark]Write down the general algebraic form of a reciprocal equation.
(b)[2 marks]Explain how you can identify a reciprocal equation just by looking at its algebraic form.
(c)[1 mark]Give an example of a reciprocal equation and state its asymptotes.