The question asks how many more students reported owning dogs than fish in a survey of 200 students, based on the pie chart. The chart shows dogs at 50% (0.50 × 200 = 100 students) and fish at 15% (0.15 × 200 = 30 students). Subtract: 100 - 30 = 70 students. Common errors include confusing percentages or adding instead of subtracting, so confirm the categories and calculations carefully.

The question asks which statement is supported by the line graph of noon temperatures over 6 days. The graph shows temperatures: Day 1 at 55°F, Day 2 at 60°F, Day 3 at 58°F, Day 4 at 65°F, Day 5 at 70°F, Day 6 at 68°F, with the highest on Day 5. This supports the statement that the greatest temperature was on Day 5. Avoid errors by checking each statement against the data points, noting decreases on Days 3 and 6 that contradict other options.

The question asks for the amount spent on Transportation from a $2,400 monthly budget, as shown in the pie chart. The pie chart allocates 15% to Transportation. Calculate 15% of 2,400: 0.15 × 2,400 = 360. A key error to avoid is misreading the percentages or applying them to the wrong category, so verify the slice labels and perform the multiplication step by step.

The question asks for the total number of pages read from Tuesday through Thursday, inclusive, based on the line graph. The graph shows Tuesday at 35 pages, Wednesday at 30 pages, and Thursday at 40 pages. Add these values: 35 + 30 + 40 = 105 pages. Be careful not to include Monday or Friday, as that is a frequent mistake, and ensure you read the plotted points accurately from the y-axis.

The question asks how many more volunteer hours the Science club completed compared to the Debate club based on the bar graph. From the graph, the Science club's bar reaches 55 hours, and the Debate club's bar reaches 30 hours. To find the difference, subtract the Debate club's hours from the Science club's: 55 - 30 = 25 hours. A common error might be misreading the y-axis scale or confusing the bars for different clubs, so always double-check the labels and values carefully.

The question asks how many students voted for the Park out of 80, based on the pie chart. The chart shows 30% for Park, so 0.30 × 80 = 24 students. Apply the percentage to the total voters. Avoid mistakes by ensuring the correct slice is used and percentages are converted properly.

The question asks how many students sent fewer than 60 messages per day, according to the histogram. The relevant bins are 0–19 with 4, 20–39 with 6, and 40–59 with 5, summing to 4 + 6 + 5 = 15 students. Sum only up to but not including 60. Avoid including higher bins by noting the 'fewer than' boundary.

The question asks how many students are in 12th grade out of 360, based on the pie chart. The chart shows 20% for 12th grade, so 0.20 × 360 = 72 students. Confirm the percentage and multiply by total. A frequent error is using the wrong grade's percentage, so match labels accurately.

The question asks during which interval the water volume increased at the greatest rate, based on the line graph. The graph shows changes: 0–10 min from 20 L to 40 L (+20 L, rate 2 L/min); 10–20 min from 40 L to 70 L (+30 L, rate 3 L/min); 20–30 min from 70 L to 70 L (+0 L, rate 0 L/min). The highest rate is in 10–20 minutes. Calculate rates by dividing change in volume by time, and compare carefully to avoid confusing intervals.

The question asks how many students studied for at least 40 minutes, according to the histogram. The relevant bins are 40–59 with 8 students, 60–79 with 5, and 80–99 with 2, summing to 8 + 5 + 2 = 15 students. Add only from the 40-minute bin onward. Common mistakes include including lower bins, so strictly adhere to the threshold.