Quadratics in Real World

Mrs. Martone's 7th grade science class built and launched rockets. The graph below shows the height, in feet, over time, in seconds, of a student's rocket. Use the graph to answer the questions below. How long was the rocket in the air?

• 1 second

• 7 seconds

• 14 seconds

The graph below shows the height, in feet, over time, in seconds, of a student's rocket. Use the graph to answer the questions below. What was the maximum height the rocket reached?

• 25 feet

• 45 feet

• 65 feet

• 85 feet

• 24 feet

• 10 feet

• -4 feet

• 3 feet

• 3 seconds

• 46 seconds

• 5 seconds

• 10 seconds

y = x² - 4x + 5

• down and down

• down and up

• up and down

• up and up

Tags

AII.9-12.8.C

A scientist dropped an object from a height of 200 feet. She recorded the height of the object in 0.5-second intervals. Her data is shown.

Based on a quadratic curve of best fit, at what time (in seconds) will the object have a height of 55 feet?

Mathematical Equivalence

OFF

Which answer choice describes  y = -3x² +7x - 2 accurately?

• opens up with a maximum

• opens up with a minimum

• opens down with a maximum

• opens down with a minimum 

A ball is thrown vertically into the air. Its height in feet after t seconds is given by the equation h(t) = –5t² + 20t. How many feet into the air will the ball be at 3 seconds?

Mathematical Equivalence

OFF

A scientist dropped an object from a height of 200 feet. She recorded the height of the object in 0.5-second intervals. Her data is shown.

Based on a quadratic curve of best fit, at what time (in seconds) will the object have a height of 55 feet?

Mathematical Equivalence

OFF