Question

the regression equation y = - 0.41x + 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 70 minutes long? 29% 15% 56% 78%

Explanation:

Step1: Substitute x value

Substitute $x = 70$ into $y=-0.41x + 106.55$.
$y=-0.41\times70 + 106.55$

Step2: Calculate the product

$-0.41\times70=-28.7$.
$y=-28.7 + 106.55$

Step3: Calculate the sum

$y = 77.85\approx78$

Answer:

78%