Question

Jane threw a basketball up in the air. The following table represents the height f(t), in meters, of the ball above the ground at time t seconds:


Time (t)
(in seconds) Height f(t)
(in meters)
2 10
4 15
6 10
8 0


Which of the following is represented by the x-intercept of f(t)?
The ball reaches the maximum height in 4 seconds.

The ball reaches a maximum height of 15 meters.

The ball was thrown from a height of 10 meters.

The ball touches the ground after 8 seconds.

Answer 1

@midhun.madhu1987

Answer 2

The ball reaches a maximum height of 15 meters.

i guess

Answer 3

A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water:

graph of y equals minus 2 times the square of x plus 20 times x plus 400

What do the x-intercepts of the graph represent?

There were 20 larvae at 0 degrees Celsius.

There were 10 larvae at 0 degrees Celsius.

The water has no larvae at -10 degrees Celsius and 20 degrees Celsius.

The water has maximum larvae at -10 degrees Celsius and 20 degrees Celsius.

Answer 4

not sure... :(

Answer 5

For the graph below, what should the domain be so that the function is at least 600?

graph of y equals minus 2 times the square of x plus 40 times x plus 600

0 ≤ x ≤ 20

-10 ≤ x ≤ 30

x ≥ 0

All real numbers

Answer 6

x ≥ 0
i think

Answer 7

The graph below shows the value of Edna's profits f(t), in dollars, after t months:

graph of quadratic function f of t having x intercepts at 6, 0 and 18, 0 and vertex at 12, negative 36

What is the closest approximate average rate of change for Edna's profits from the 12th month to the 18th month?

5.92 dollars per month

3.75 dollars per month

Five dollars per month

Nine dollars per month