Item 25 Use a graphing calculator or other technology to answer the question.

Which quadratic regression equation best fits the data set?

yˆ=32.86x2−379.14x+1229.14

yˆ=32.86x2+379.14x−1229.14

yˆ=−1229.14x2−379.14x+32.86

yˆ=32.86x2−379.14x

Determine if the function below is continuous. a. continuous b. not continuous, 1 hole c. not continuous, > 2 holes d. not continuous, 2 holes

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth