(a)[2]
The equations are $y = 2x + 1$, $y = 2x - 1$, $y = -2x + 1$ and $y = -2x - 1$. The diagrams below contain sketches of two of these lines. Write the correct equation under each diagram.
(b)[2]
The diagram shows a sketch of the graph of $y = x^2 + ax + b$. Determine the value of $a$ and the value of $b$.
(c(i))[2]
The grid displays the graph of $y = x^3 - 2x^2 - 5x + 6$. $x^3 - 2x^2 - 5x + 6 = k$ has exactly $2$ solutions. Use the graph to identify the possible values of $k$.
(c(ii))[4]
By drawing a suitable line on the grid, determine the solutions of $x^3 - 2x^2 - 7x + 5 = 0$.