In the table, f(x) is a linear function. What is the value of k ?
\begin{array}{ll} \hline x&f(x) \\ \hline 0&4 \\ \hline 1&1 \\ \hline 2&2 \\ \hline 3&k \\ \hline 4&8 \\ \hline \end{array}

×
2

×
3

×
4

✓
5

×
6
In the table, f(x) is a linear function. What is the value of k ?
\begin{array}{ll} \hline x&f(x) \\ \hline 0&4 \\ \hline 1&1 \\ \hline 2&2 \\ \hline 3&k \\ \hline 4&8 \\ \hline \end{array}
2
3
4
5
6
From the data in the table, it’s observed that f(x) is actually an arithmetic sequence with common difference 3
So when x=3, f(x) =5