Explanation
In a linear relationship, the y-values have equal differences. and
In an exponential relationship, the y-values have equal ratios.
so
Step 1
find the common difference ( if there is )
[tex]\begin{gathered} \text{difference}1=\text{ 6-3=3} \\ \text{difference}2=12-6=6 \\ \text{difference3=}24-12=12 \\ \text{difference}4=48-24=24 \end{gathered}[/tex]we can see the diffrence is not the same, so
it is not liear
Step 2
check the common ratio
[tex]\begin{gathered} \text{ratio }_1=\frac{6}{3}=2 \\ \text{ratio }_2=\frac{12}{6}=2 \\ \text{ratio }_3=\frac{24}{12}=2 \\ \text{ratio }_4=\frac{48}{24}=2 \end{gathered}[/tex]so, the ratio is common,
therefore, the answer is
Exponential