how to graph on webassign

3 min read 17-01-2025

WebAssign is a popular online homework platform used by many universities and colleges. While it excels at assessing your understanding of concepts, graphing can sometimes be tricky. This guide will walk you through how to graph various functions and equations on WebAssign, minimizing frustration and maximizing your score.

Understanding WebAssign's Graphing Tools

WebAssign offers a variety of graphing tools depending on the specific assignment. You'll generally encounter one of two main interfaces: a simple point-plotting tool or a more advanced function-input tool.

1. Point Plotting: The Basics

Some assignments require you to plot points manually. This is usually straightforward:

Locate the axes: The x and y axes will be clearly labeled.
Identify the points: Your assignment will provide coordinates (x, y).
Click and Plot: Click on the graph where the point should be located. WebAssign usually has a tolerance for slight inaccuracies.

Example: Plot the points (1, 2) and (-1, -2). Click on the graph near the coordinates (1,2) to plot the first point, and then near (-1,-2) for the second.

2. Function Input: More Advanced Graphing

For more complex tasks, you'll use a function-input tool. This is where things can get a little more involved. Here's a breakdown:

a) Identifying the Input Box: Look for a text box or input field where you'll enter your function. It might be labeled "Enter function," "Equation," or similar.

b) Function Syntax: WebAssign uses standard mathematical notation. Pay close attention to syntax:

Variables: Typically 'x' is used as the independent variable.
Operators: Use standard symbols: + (plus), - (minus), * (multiplication), / (division), ^ (exponentiation).
Parentheses: Use parentheses liberally to ensure correct order of operations. For example, (x+1)^2 will be interpreted differently than x+1^2.
Functions: Common functions like sin(x), cos(x), tan(x), ln(x), sqrt(x), and abs(x) are usually supported. Be sure to use the correct function notation (e.g., sin(x), not sin x).

c) Entering the Function: Type your function into the input box precisely. WebAssign is often case-sensitive, so use lowercase x unless otherwise specified.

d) Previewing Your Graph: Most WebAssign interfaces provide a preview of your graph as you type. This allows you to catch errors before submitting your answer.

e) Common Issues and Troubleshooting:

Incorrect Syntax: Double-check for typos, missing parentheses, or incorrect use of operators.
Domain Restrictions: If your function has a restricted domain (e.g., a square root), WebAssign might only show the portion of the graph within the allowed domain.
Scale Issues: If your graph doesn't appear as expected, check the scale of the axes. You may need to zoom in or out.
Function Misunderstanding: Ensure you correctly understand the function you're trying to graph before inputting it. Work out a few points manually to check your understanding.

Example: Graphing a Parabola

Let's graph the parabola y = x² - 2x + 1.

Locate the function input box.
Enter the function: Type x^2 - 2*x + 1 into the box. Notice the use of * for multiplication and ^ for exponentiation.
Check the preview: WebAssign should display a parabola. If it's not correct, re-examine your entry for errors.
Submit your answer: Once you are satisfied with the graph, submit your answer.

Graphing Inequalities

Graphing inequalities on WebAssign involves similar steps, but you need to consider the inequality symbol:

< (less than): The region below the line or curve will be shaded.
> (greater than): The region above the line or curve will be shaded.
≤ (less than or equal to): The line or curve will be solid, and the region below will be shaded.
≥ (greater than or equal to): The line or curve will be solid, and the region above will be shaded.

WebAssign may provide tools to shade the appropriate region; otherwise, you might be expected to correctly input the function and understand the implied shading.

Beyond Basic Functions

WebAssign might also ask you to graph piecewise functions, parametric equations, or polar equations. The specific methods for these will vary, but the general principles of accurate function entry and careful attention to syntax remain crucial. Consult your textbook or WebAssign's help resources if you encounter unfamiliar function types.

Conclusion

Mastering graphing on WebAssign takes practice. By understanding the different graphing tools, paying close attention to syntax, and using the preview function, you can confidently tackle even the most challenging graphing assignments. Remember, if you encounter difficulties, refer to WebAssign’s help section or your instructor for assistance. Good luck!