Step $6$

To verify the result, ${\displaystyle \underset{i=1}{\overset{24}{}}}3i=900,$ use the LIST MATH menu from the graphing utility. The procedure for a TI$-83$ calculator is given below.

Press $2$nd $[$LIST$]$ to display the LIST MATH and the LIST OPS menus.

Press $5$ to select $5$ : sum $(,$ which pastes sum$($ to the current cursor location.

Press $2$nd $[$LIST$]$ to display the LIST OPS menu.

Press $5$ to select $5$ : seq$(,$ which pastes seq$($ to the current cursor location.

Press $3$ ALPHA $[i]x,$ aLPHA $[i],1,24,1,j,$ ENTER to obtain the sum of the sequence.

The display is shown below.

Thus, the sum of the sequence ${\displaystyle \underset{?}{\overset{?}{}}}3$i from $i=1$ to $24$ using the graphing calculator is

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