Does anyone know what the answer is because I’m confused.

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap