Question

when did the temperature first reach 26°c? 4pm 11am 1pm 10am

Explanation:

To determine when the temperature first reached \(26^\circ\text{C}\), we analyze the graph:

• At 11 am, the temperature is around \(18^\circ\text{C}\) (too low).
• At 10 am, it's around \(17^\circ\text{C}\) (too low).
• At 4 pm, the temperature is decreasing from a peak (not the first time).
• At 1 pm, the temperature curve shows an increase towards the peak, and by 1 pm, the temperature has risen enough to reach \(26^\circ\text{C}\) for the first time (comparing the options, 1 pm is the time when the temperature first reaches \(26^\circ\text{C}\) as the earlier times have lower temperatures and 4 pm is a decrease phase).

Answer:

C. 1pm (Note: Using the option labels from the problem, the correct option is the one with "1pm", so in the problem's option list, it's the third option: \(\boldsymbol{\circ}\) 1pm)