Set up an equation and solve for x

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?

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?

I’m not good at math can i have ? ?