For each interval, compute $\text{change in }y = y_\text{later} - y_\text{earlier}$.

The correct interval is the one with the largest positive change in $y$.

In Desmos, add a table and enter the points:

$x$: 1, 2, 3, 4, 5, 6, 7, 8

$y$: 10, 12, 18, 17, 20, 25, 26, 24

Compute the increases for the intervals in the answer choices by subtracting consecutive $y$-values (for example, $y(3)-y(2)$). Identify which interval has the largest positive difference.

From the scatterplot:

• $x=1$ to $x=2$: $y$ goes from $10$ to $12$, so the increase is $12-10=2$
• $x=2$ to $x=3$: $y$ goes from $12$ to $18$, so the increase is $18-12=6$
• $x=4$ to $x=5$: $y$ goes from $17$ to $20$, so the increase is $20-17=3$
• $x=5$ to $x=6$: $y$ goes from $20$ to $25$, so the increase is $25-20=5$

The largest increase is $6$, so the greatest increase occurred from $x = 2$ to $x = 3$.