Use a graphing calculator or other technology to answer the question. Which quadratic regression equation best fits the data set? yˆ=2.608x2−115.265x+1568.065
yˆ=1568.065x2−115.265x+2.608
yˆ=1568.065x2+115.265x+2.608
yˆ=2.608x2+115.265x+1568.065
x y
15 423
17 398
19 308
20 255
21 297
25 365
29 401
