During a study, the temperature, in degrees (°C) Celsius, of the air in a chamber was recorded to the nearest integer at certain times. The scatterplot °C shows the recorded temperature y, in, of the air in the chamber x minutes after the start of the study. y 3 2^0 8 2 6 2 4 2 2 2 0 1 Temperature 1^8 6 l 4 coc) 2 1 0 8 6 4 2 X 0 1 2 3 4 5 6 7 8 Time (minutes) What was the average rate of change, in °C per minute, of the recorded temperature of the air in the chamber from x = 5 to x = 7?
Correct answer: 5 (parsed from the explanation — this source omits an answer key for this item)
Explanation
The correct answer is 5. For the graph shown, x represents time, in minutes, and °C y represents temperature, in degrees Celsius ^ h. Therefore, the average rate of °C change, in per minute, of the recorded temperature of the air in the chamber between two x-values is the difference in the corresponding y-values divided by = the difference in the x-values. The graph shows that at x 5, the corresponding 14 = 24 y-value is . The graph also shows that at x 7, the corresponding y-value is . °C = = It follows that the average rate of change, in per minute, from x 5 to x 7 is 24-14 10 7-5 , which is equivalent to 2, or 5.
Loading…
Searched on YouTube by topic, not by question text. Open this search on YouTube →
Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.