1. The table below shows the height and weight of seven students in Ms. Simmons’ 8th block Algebra I class.

x / Height (in) / 60 / 62 / 64 / 66 / 68 / 70 / 72
y / Weight (lbs) / 105 / 111 / 123 / 130 / 139 / 149 / 158

a)What equation most closely represents a line of best fit for the data?

b)What could be the weight of a student that is 75 inches tall?

  1. The table below shows the typing speed (in words per minute) of students in Mr. Johnson’s keyboarding class and the number of weeks experience in the class.

x / Experience (weeks) / 4 / 7 / 8 / 1 / 6 / 3 / 5 / 2 / 9 / 6 / 7 / 10
y / Typing Speed (wpm) / 33 / 45 / 46 / 20 / 40 / 30 / 38 / 22 / 52 / 44 / 42 / 55

a)What equation most closely represents a line of best fit for the data?

b)What could be the typing speed of a student who has been in the class for 12 weeks?

Create a line of best fit to write a prediction equation for each data set.

  1. 6.

Equation: ______Equation: ______

Distance(feet), x / Height (feet), f(x)
0 / 4
2 / 8.4
6 / 12.1
9 / 14.2
12 / 13.2
13 / 10.5
15 / 9.8

4. Amery recorded the distance and height of a basketball when shooting a free throw.

1.Find the quadratic equation for the relationship of the horizontal distance and the height of the ball. Round to 3 decimalplaces.

2.Using this function what is theapproximate maximum height of theball?

5.Which of the following is best modeled by a quadraticfunction?

  1. Relationship between circumference anddiameter.
  2. Relationship between area of a square and sidelength.
  3. Relationship between diagonal of a square and sidelength.
  4. Relationship between volume of a cube and sidelength.

6. Which is the quadratic equation the best fits the scatterplot?

A. f xx2 8x22

B.fxx28x10

C.fxx28x32

D. fxx28x10

7. Write a quadratic equation that fits each set of points.

(0. -8), (2, 0), and (-3, -5)