Algebra 1 Quadratic Word Problems Key Words Practice

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation

s(t) = –16t² + 64t + 80

What would you find to determine the object's maximum height?

• y-intercept

• x-value at vertex

• y-value at vertex

• Plug in given value.

You jump off a 24 foot high cliff and your fall is modeled by the function:

h(t) = -16t² + 8t + 24

What would you find to determine the how long would it take you to reach maximum height?

• y-intercept

• x-value at vertex

• y-value at vertex

• plug in given value for t.

You jump off a 24 foot high cliff and your fall is modeled by the function:

h(t) = -16t² + 8t + 24

What would you do to determine the height after 2 seconds?

• y-intercept

• x-value at vertex

• y-value at vertex

• plug in given value

A diver is standing on a platform above the pool. He jumps form the platform with an initial upward velocity of 8 ft/s. Use the formula: h(t) = −16 t² + 8t + 24

What would you find to determine the height of the platform?

• y-intercept

• x-value at the vertex

• y-value at the vertex

• Plug in given value

Jason launched a rocket for a physics experiment. This equation can be used to find the height (h), in feet, of the rocket after t seconds.

h = -16t² + 288t + 8

What would you find to determine the maximum height of the rocket?

• y-intercept

• y-value at the vertex

• x-value at the vertex

• Plug in given value for t.