The table gives some values of $y = 2^x - 3$.
(a)[3]
Complete the table fully.
(b)[4]
Draw, on the grid, the graph of $y = 2^x - 3$ for $-2 \le x \le 2.5$.
(c)[1]
Use your graph to determine the solution of $2^x - 3 = 2$.
(d)[4]
By drawing an appropriate straight line, solve the equation $2^x - x - 1.5 = 0$.
Worked solution & mark scheme
This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The solutions are $-2.5,-2,-1$.” …
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