Determine whether the function is linear or quadratic. Identify the quadratic, linear, and constant terms.


A) quadratic function
quadratic term: 9x2
linear term: −1x
constant term: –6


B) linear function
linear term: 9x
constant term: –6


C) quadratic function
quadratic term: 15x2
linear term: 9x
constant term: –6


D) linear function
linear term: 15x2
constant term: –6