To examine the marks left by a gun’s barrel on two sample bullets, a forensic scientist might use a:

An investigator collects a blood sample but does not know if it is from a human or an animal. To make a determination, the forensic lab completes a:

The first step in investigating a crime is to:

Plot the three points , , and on the coordinate plane. State whether the three points you plotted appear to be collinear (on the same line).  Remember to show your work by drawing the graph and plotting the points.Be sure to draw out the graph and plot the three points.   

Find the x-intercept  and the y-intercept  of the equation WITHOUT graphing. Remember to show you work! TIP: Remember what intercepts represent x-intercept: This is where the graph crosses the x-axis.  y-intercept: This is where the graph crosses the y-axis.   

Graph the pair equations and and state whether they are parallel, perpendicular, or neither. TIP: Make sure each equation is written in the point-slope form. Think about the relationship between parallel lines and their slop, and perpendicular lines and their slope.   

Construct a table and graph the equation by plotting at least three points.  Select the graph below that matches the graph you drew on your paper. TIP: Think about what the slope tells you about the line as it moves from left to right.

What does skewness measure in a frequency distribution?

Use the distance formula    to find the distance between the points and . Simplify your answer and write the exact answer in simplest radical form for irrational answers. Remember: the distance is the distance between two points ad  

What does a step chart typically represent in medical studies, particularly in survival analysis?