The temperature of lake water over a period of time is shown in the graph below.

Question

https://wca.sooschools.com/media/g_alg01_ccss_2015/9/img_alg1u09l15_14.gif

The first temperature is recorded at 9 p.m. At what time is the water at its lowest temperature?_

 

Complete the statement below for the temperature recorded at 7 a.m.

After _ hours have passed, the temperature of the lake water is _ degrees.

Answer 1

First temperature recorded is 59 ^o F at 9 p.m

 

Lowest temperature is observed 6 hr after recording the first observed value . So the time must be 3 a.m

 

After 10 hrs, that is at 7 p.m the temperature of the lake water is 54 ^o F.