Mathematics 0580 · IGCSE · Graphs of functions

Graphs of functions — practice question

The diagram displays the graph of $y = f(x)$ for $-3.5 \leq x \leq 2.5$.
(a(i))[1]

Find the value of $f(-2)$.

(a(ii))[3]

Solve the equation $f(x) = 2$.

(a(iii))[2]

Two tangents, each with gradient 0, may be drawn on the graph of $y = f(x)$. Write down the equation of each tangent.

(b(i))[3]

Complete the table for $g(x) = \frac{2}{x} + 3$ when $-3.5 \leq x \leq -0.5$ and $0.5 \leq x \leq 2.5$.

(b(ii))[4]

On the grid opposite, draw the graph of $y = g(x)$.

(b(iii))[2]

Use your graph to solve the equation $f(x) = g(x)$.

(c)[2]

Find $gf(-2)$.

(d)[1]

Find $g^{-1}(5)$.

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