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