using these--(GPA, hours spent studying)
(4.0, 5)(2.6, 3)(3.9, 6)(1.8, 1.5)( 2.2, 2)(1.9, 1)(3.2, 4)(3.6, 5.5)(2.5, 2)(3.4, 3.5)
what is the estimated GPA if you study for 15 hours