The volume of helium in a balloon is modeled by the function
y = -1.1x3 + 3x? + 1, where x is
the number of seconds after the helium tank is turned on. What point on the graph represents the volume of helium in the balloon just before the tank was turned on?
To find the volume of helium in the balloon just before the tank was turned on, we substitute x = 0 into the function.
y = -1.1(0)^3 + 3(0) + 1
y = 0 + 0 + 1
y = 1
Therefore, the point on the graph representing the volume of helium in the balloon just before the tank was turned on is (0, 1).