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9th

grade

62%

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Robert Martinez

4 years

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14 questions

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- 1. Multiple Choice1 minute1 ptThe graph of a quadratic function is called aParabolaVertexAxis of SymmetryVertex Form
- 2. Multiple Choice30 seconds1 ptAn object flies through the air and follows a parabolic path. What does the y-axis represent?timeheight from the groundhorizontal distancemoney
- 3. Multiple Choice30 seconds1 ptAn object flies through the air and follows a parabolic path. Which of these typically represents the x-axis?timeheight from the ground
- 4. Multiple Choice30 seconds1 ptWhat is the initial (starting) height of an object following this path? h(t) = -16t
^{2}+20t + 6-16 feet0 feet20 feet6 feet - 5. Multiple Choice30 seconds1 ptIf path of a projectile is modeled by:

h(t) = -16t^{2}+ 20t +6, what is the height after 1 second?6 feet20 feet10 feet4 feet - 6. Multiple Choice2 minutes1 ptIdentify the 'a' value: y = 16x
^{2}-8x -24168-8-24 - 7. Multiple Choice2 minutes1 ptIdentify the 'b' value: y = 16x
^{2}-8x -2416-88-24 - 8. Multiple Choice2 minutes1 ptIdentify the 'c' value: y = 16x
^{2}-8x -2416-824-24 - 9. Multiple Choice5 minutes1 ptA soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t
^{2 }+ 90t gives the height h of the ball after t seconds.

What is the maximum height of the ball?126.56 ft5.625 sec2.81 sec90 ft - 10. Multiple Choice15 minutes1 ptAn 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) = –16t^{2}+ 64t + 80.

What will be the object's maximum height?2 ft80 ft144 ft64 ft - 11. Multiple Choice5 minutes1 ptIf a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation

h(t) = -16t^{2}+128t

When will the object reach its maximum height?4 ft0 seconds0 ft4 seconds - 12. Multiple Choice15 minutes1 ptA ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function

h = -16t^{2}+ 64t + 960.

How many seconds did it take for the ball to reach its maximum height?10 seconds64 seconds960 seconds2 seconds - 13. Multiple Choice15 minutes1 ptAlain throws a stone off a bridge into a river below. The stone's height (in meters above the water), x seconds after Alain threw it, is modeled by:

h(x)= -5x^{2}+ 10x + 15

How many seconds after being thrown will the stone hit the water?-1 seconds1 second2 seconds3 seconds - 14. Multiple Choice5 minutes1 ptAlain throws a stone off a bridge into a river below. The stone's height (in meters above the water), x seconds after Alain threw it, is modeled by:

h(x)= -5x^{2}+ 10x + 15

How long does it take the stone to reach its highest point?1 seconds1.5 seconds2 seconds3 seconds - Answer choicesTagsAnswer choicesTags
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