A volleyball is served from a height of 6 feet with an initial velocity of 33 feet per second. The situation is modeled using the function h=−6t2+33t+6

, where h is the height in feet and t is time in seconds. Which of the following uses the function to correctly identify the corresponding y-values to the given x-values of 0, 1, 2, 3, and 4?

1 answer

To find the corresponding y-values (heights) for the given x-values (time in seconds) using the function \( h = -6t^2 + 33t + 6 \), we simply need to substitute each x-value into the equation and calculate the corresponding h-value.

  1. For \( t = 0 \): \[ h(0) = -6(0)^2 + 33(0) + 6 = 6 \]

  2. For \( t = 1 \): \[ h(1) = -6(1)^2 + 33(1) + 6 = -6 + 33 + 6 = 33 \]

  3. For \( t = 2 \): \[ h(2) = -6(2)^2 + 33(2) + 6 = -6(4) + 66 + 6 = -24 + 66 + 6 = 48 \]

  4. For \( t = 3 \): \[ h(3) = -6(3)^2 + 33(3) + 6 = -6(9) + 99 + 6 = -54 + 99 + 6 = 51 \]

  5. For \( t = 4 \): \[ h(4) = -6(4)^2 + 33(4) + 6 = -6(16) + 132 + 6 = -96 + 132 + 6 = 42 \]

Now, we can summarize our results:

  • \( t = 0 \) → \( h = 6 \)
  • \( t = 1 \) → \( h = 33 \)
  • \( t = 2 \) → \( h = 48 \)
  • \( t = 3 \) → \( h = 51 \)
  • \( t = 4 \) → \( h = 42 \)

Thus, the corresponding y-values (heights) for the x-values (time in seconds) of \( 0, 1, 2, 3, \) and \( 4 \) are as follows:

  • For \( t = 0 \): \( 6 \)
  • For \( t = 1 \): \( 33 \)
  • For \( t = 2 \): \( 48 \)
  • For \( t = 3 \): \( 51 \)
  • For \( t = 4 \): \( 42 \)