what is a regression model? and how would you write it on paper

Answer:
Hope this helps, if so please give brainliest!
Step-by-step explanation:
Simple regression analysis uses a single x variable for each dependent “y” variable. For example: (x1, Y1). Multiple regression uses multiple “x” variables for each independent variable: (x1)1, (x2)1, (x3)1, Y1).