Hi there!
Answer:
The temperature at lunchtime is 0 degrees Celsius.
Step-by-step explanation:
This is because we started at -2 and when we add 2 that brings us back at 0 (or neutral).
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In this exercise we will use the knowledge of equation of the line plus the knowledge of logarithm, like this:

First, we have the following values informed, such as:
Knowing that the formula for the equation of the line is given by:

The logarithm form will be:

See more about logarithm at brainly.com/question/7302008
2(x-3)=2x-6 then add 4 = 2x-2