Question

The regression equation y equals negative 0.414 x plus 106.55 approximates the percent of people in an audience who finish watching a documentary, y, given the length of the film in minutes, x.

Which percent is the best prediction for the percent of people in an audience who will finish watching a documentary that is 85 minutes long?


75%


71%


67%


32%

Answer 1

(b) 71%

Explanation:

Put the given value of x in the formula and do the arithmetic.

-0.414(85) +106.55 = -35.19 +106.55 = 71.36

About 71% of the audience will finish watching the film.