<span>The rental charge per hour.
The rental fee of 6x+15 is split into 2 parts, a fixed overhead of $15 to just rent the bike, plus an additional fee of $6 for each hour that you have the bike. To show this, plug in the value of 2 for the number of hours Danny rented the bike.
x = 6 * 2 + 15
x = 12 + 15
x = 27
And since Danny was charged $27, the figures match. So the coefficient of 6 represents the hourly rental rate.</span>
Y ( 2 ) = - 5.131 · 2² + 31.821 · 2 - 3.3333 =
= - 5.131 · 4 + 63.642 - 3.3333 = -20.524 + 63.642 - 3.3333 = 39.78 ≈ 40
Answer: B ) 40.
