Name:
You may use a calculator on this quiz. You may not use a cell phone or
computer. To receive full credit please show your work carefully and
give justifications for your answers. If you find that you are
spending a lot of time on one problem, leave it blank and move on to
the next. There are questions on both sides of this page.
(20 points) Find the slope of a line passing through points (1,2)
and (4, 23).
(20 points) Find the equation of the line that contains the points
in the table:
x
1
2
3
4
5
y
3
10
17
24
31
(20 points) A scatter plot is shown below. If the data appears
linear, draw a line that fits the data. If you think a linear model
would not represent the data well, explain why not.
The table below shows the average ocean wave heights for different years over three decades.
Year
1962
1968
1974
1979
1984
Wave Height (ft)
6.9
7.6
7.7
9.3
8.9
a) (20 points) Which variable is the independent variable and which is
the dependent variable? Why?
b) (20 points) Use the grid below to draw a scatter plot of the data
with the independent variable along the horizontal axis and the
dependent variable along the vertical axis.
Bonus (5 points) Give the equation of the line passing through
the points (1,2) and (4,23).