What is the equation of this trend line?

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Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Can someone check if i did this correct. it’s number 4 if you’re wondering.