Multiple Choice
1. The set of ordered pairs below defines y as a function of x. Which of the following is the output of the function when its input is 4?
{(-2, 4), (0, 3), (4, 11), (7, -1)}
(4)11
7. (a) Give the outputs for each of the following inputs
input = 4
input = -1
input = 4 output = 2
input = -1 output = -3
6. Each scatter plot below shows the same set of data. Which choice has the most appropriate best fit line drawn for this data set?
(1)
2. The graph below shows a function. Which of the following is not in the range of the function?
(2)7
7. (b) List all inputs that have an output of 5.
x = 1
x = 3
9. (b) Would you rate the strength of the fit as weak, moderate, or strong? Justify
Moderate or strong because the points are relatively close to the line.
4. Mya lives on the third floor of her apartment building, located 35.7 feet above the ground. She takes an elevator that rises at a rate of 4.5 feet per second to the 22nd floor. Which function below describes Mya’s height, h, as a function of the time, t, in seconds she has been in the elevator?
(3) h=35.7t +4.5
7. (d) List the coordinates of all turning points of the function.
Hint: There are 3
(-1, -3)
(2, 6)
(4, 2)
7. (c) What is the maximum value of the function?
Max = 6
5. Which table could not represent a linear function?
(3)
9. (a) Is there a positive or negative relationship between these two variables? Justify.
Negative because the line of best fit has a negative slope.
7. (e) Is the function increasing or decreasing from x=2 to x=4?
decreasing
3. David is keeping track of the internal temperature of a chicken he is cooking. The table below shows how its temperature is a function of the time it has been in the oven. Which of the following gives the average rate that the temperature is increasing at from 15 to 45 minutes?
(1) 2.1 degrees per minute
8. (a) Draw a line of best fit on the graph for this data set
(b)Using two points on the line you drew, calculate the slope of the best-fit line. Express it as a decimal accurate to the nearest tenth.
Answer should be around 2.2
What formula do we use to find the slope of a line through two points?
y2-y1 over x2-x1