1. In physics, graphical analysis is useful for:

a) guiding the understanding of the relationships between physical quantities b) confirming or refuting existing theoretical models c) visualizing (possible) correlations between observables d) all of the answers are correct

2. When using a pencil and a ruler to make a scatter-style plot on a piece of graph paper, the graph should include:

a) axes drawn on the very edge of the grid-line pattern b) the plotting of the dependent variable on the horizontal axis c) the use of the same scaling factor on both axes d) none of the answers is correct

3. When determining the best-fit line "by eye" for a particular set of data:

a) the line should be drawn so that two-thirds of the data points fall above it and one-third below

b) the slope should be calculated from two of the original data points

c) the line should be drawn by connecting the individual data points with line

segments

d) the slope should be calculated from two selected locations on the best-fit line

4. The trend line fit to a particular data set is the linear function Y(X) = - 5 X + 9. The slope and y-intercept of the line described by this equation are:

a) negative and negative, respectively

b) positive and negative, respectively

c) negative and positive, respectively

d) positive and positive, respectively

5. To create a semi-log plot using a spreadsheet program

a) one must select the logarithmic scale for the horizontal axis

b) one must take the logarithm of the y values before creating a graph

c) one must select the logarithmic scale for the vertical axis

d) one must select the logarithmic scale for both the horizontal and vertical

axes