Ez question unit and proportions??

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.