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- 1. Multiple Choice
Find the best fitting quadratic model for the data given.
y = 1.2x2 + 13x + 504.3
y = 12x2 + 13x + 504.3
y = .12x2 + 1.3x + 504.3
- 2. Multiple Choice
Using the quadratic curve of best fit, find the height of the ball when it traveled a distance of 10 feet.
12.8 ft
13.3 ft
11.1 ft
17 ft
- 3. Multiple Choice
Calculate the Curve of Best Fit for this table of values:
y = 2x2 - 9x + 10
y = 3x2 + 9x - 10
y = 3.1x2 - 9.2x - 10.3
y = 2.1x2 - 8.6x + 10.1
- 4. Multiple Choice
What would the equation be that best fits this data?:
{(-15, 53.5), (-14, 28), (-3, 18), (0, 4), (6, 27), (14, 50)}
y = .17x2+.45x+12.43
y = .16x2+.45x+12.42
y = -.04x + 30
y = -.03x + 30
- 5. Multiple ChoiceThe table shows the average braking distance of a car at various speeds. Use a quadratic model to predict the breaking distance at 70mph.245 ft225 ft285 ft265 ft
- 6. Multiple Choice
Using the curve of best fit, what would be the output (y) when the input (x) is 7?
260
240
140
320
- 7. Multiple Choice
When using Desmos to find the curve of best fit, what do I need to enter first?
y1 ~ ax12 +bx1 + c
the equation
the table/chart of values
the vertex
- 8. Multiple Choice
When finding the curve of best fit in Desmos, what do I do after I entered my table of coordinates?
plot the points
y1 ~ ax1 +b
y1 ~ ax12 +bx1 + c
do a little dance
- 9. Multiple Choice
If this is an equation for a curve of best fit, find the output (y) when the input (x) is 13:
y = 1.2x2 - 3.7x - 19
-51.5
135.7
154.7
183,8
- 10. Multiple Choice
In the equation
y = x2 +5x +7, match each coefficient with its correct letter
a=0, b=5, c=7
a=1, b=5, c=7
a=7, b=5, c=1
- 11. Multiple Choice
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 model, which best approximates the height at 3 seconds?
52 feet
55 feet
65 feet
80 feet
- 12. Multiple ChoiceCalculate the quadratic regression function for this table of values to the nearest tenth.f(x) =
2x2 - 9x + 10f(x)=
3x2 + 9x - 10f(x) =
3.1x2 - 9.2x - 10.3f(x) =
2.1x2 - 8.6x + 10.1 - Answer choicesTagsAnswer choicesTags