Question

Question 79(ii)

Consider this input/output table.
$\begin{array}{cccccc}Input& 1& 2& 4& 5& 7\\ Output& 2& 5& 11& 14& 20\end{array}$
Use your graph to predict the outputs for inputs of 3 and 8.

Answer 1

Based on the table, we can determine that the pattern is $y=3x-1$.


If $x=3$, then $y=3\times 3-1=9-1=8$
If $x=8$, then $y=3\times 8-1=24-1=23$