Pls show step by step explanation ​

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Acircle has a circumference of 28.36 units what is the diameter of the circle