23)(a) How is a graph plotted?
(b) In what ways are the graphs in data analysis? can anybody help me
Answers
Answer:
a) Appropriate quality graph paper
Graph fills the entire sheet of this high quality paper
Axes are labeled (including units)
Divisions on axes are evenly spaced.
Your data plot is a smooth line or curve drawn to fit the pattern of your data
Graph has a title that includes all important information
You have extracted the information you need from the graph
Manual Calculation of the Slope of a Line
In order to get the most accurate slope from a graph, you must first make sure your data is taking up at least 3/4 of the space on the page. After adding the data points to your graph, you will want to draw in either a straight line or a curve. For activity 3, you will use a straight line. This line will never be a connect-the-dots project. Rather, the goal is to get the line to come close to as many of the points as possible.
From this graph, we are trying to determine the density of an unknown substance. First, you know that density is mass divided by volume.
When you made your graph, you plotted volume on the x-axis and mass on the y-axis. The equation for determining the slope is
.
Thus you have mass divided by volume and the slope of the line is equal to the density.
Next you need to determine the slope of the line. Look at the line you have drawn and choose two places where the line you have drawn crosses a corner of one of the "boxes" on the graph paper. You do NOT want to use your original data points because that would defeat the purpose of drawing a straight line that fits the data! Take the coordinates of these two points and put the data into the slope equation to calculate the slope.
If you have followed all of these steps and made wise decisions along the way, you should now have a graph that is pleasing to the eye, chock full of information, and worth lots of points on your lab report.
b) Review your data. Try to look at the results of your experiment with a critical eye. Ask yourself these questions:
Is it complete, or did you forget something?
Do you need to collect more data?
Did you make any mistakes?
Calculate an average for the different trials of your experiment, if appropriate.
Make sure to clearly label all tables and graphs. And, include the units of measurement (volts, inches, grams, etc.).
Place your independent variable on the x-axis of your graph and the dependent variable on the y-axis
pls mark me as BRAINLIEST