Question

how long did it take the water to reach 70 degrees celsius?
time vs. temperature of heated water
chart: x - axis time (minutes) 0 - 6, y - axis temperature (degrees c) 0 - 120, data points at (0,20), (1,~25), (2,~38), (3,~52), (4,~78), (5,~90), (6,~100)
options:
2 minutes
3 minutes
3.5 minutes
4 minutes
5.5 minutes
it never reached 70 degrees.

Explanation:

Step1: Analyze the graph

The graph shows time (in minutes) on the x - axis and temperature (in degrees Celsius) on the y - axis. We need to find the time when the temperature is 70°C.

Step2: Check the data points

At 3 minutes, the temperature is around 50°C (from the graph's data point). At 4 minutes, the temperature is 80°C. The temperature of 70°C should be between 3 and 4 minutes. Among the options, 3.5 minutes is between 3 and 4 minutes and is the most reasonable estimate for when the temperature reaches 70°C.

Answer:

3.5 minutes