Mathematics 0580 · IGCSE · Graphs of functions

Graphs of functions — practice question

The table gives several values of $y = 3x^2 - 2x - 1$.

(a)[1]

Complete the table entries.

(b)[3]

Using the grid, plot the graph of $y = 3x^2 - 2x - 1$ for $-1 \leq x \leq 1.5$.

(c)[3]

Solve the equation $3x^2 - 4x - 2 = 0$ for $-1 \leq x \leq 1.5$ by drawing a suitable straight line.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The missing values are $0.75$ and $-1.25$.” …