Chapter 6 – Test Review
1. Describe the trend in the scatter plot
below as positive correlation, negative
correlation, or no correlation.
3. The rate of change is constant in the
graph. Find the rate of change. Explain what
the rate of change means for the situation.
Name ____________________________
2. Find the slope of the line below.
4. The rate of change is constant in the table.
Find the rate of change. Explain what the rate
of change means for the situation.
Find the slope of the line that passes through each pair of points.
5. (-3, 9), (-3, 5)
6. (-5, -2), (7, -6)
Find the slope and y-intercept of each equation.
7. y  4  6 x
8. 2y + 6x = 8
For each equation express the slope in two ways. Then graph each equation.
1
8
x7
9. y 
10. y  3 x
11. y  x  2
6
3
12. Write the equation of a line with the given slope and y-intercept in slope-intercept form.
2
5
slope 
y-intercept 
3
2
Write the slope-intercept form of the equation for the lines.
13.
14.
15. A television production company charges a basic fee of $1,000 and then $6,500 per hour
when filming a commercial.
a.)
Define your variables.
b.)
Write an equation in slope-intercept form relating the basic fee and per-charge.
c.)
Use your equation to find the production costs if 3 hours of filming were needed.
16. The following table shows the data between the age of an infant and how much he/she weighs.
a. Make a scatter plot of the data (be sure to label your graph!)
Age
(months)
1
2
3
4
1
4
7
6
5
Weight
(lbs)
8
12
11
13
6
11
15
18
17
b. What does each point represent on the graph?
c. Draw a line of best fit for your graph.
d. Does the graph have positive, negative, or no correlation?
__________________________
e. Explain what the correlation means in context of the problem.
f. If the trend continued, predict how much an 8 month old baby would weigh.
____________________