Drawing graph of functions HELP

In summary, the conversation is about drawing a graph of the function y=fr(x), where fr(x)=1.5/sin(x) and the domain is (0,1/2*\pi). The person is struggling with drawing the graph and is looking for a step-by-step approach. They have tried using their calculator, but it keeps giving them a parallel line of y=1.5. They are advised to try putting in different values for x between 0 and (1/2)\pi.
  • #1
ghostbuster25
102
0
drawing graph of functions...HELP!

ok, i am going to admit i am TERRIBLE when it comes to drawing graphs of functions. I have no idea what i am doing and kind of need a step by step approach. I really want to learn the best way of doing this as its now a big obstacle in my course.

The question i have is basically plot a graph of the function y=fr(x)
Im told that fr(x)=1.5/sin(x)
the domain is (0,1/2*[tex]\pi[/tex])

I already have an answer of what the graph SHOULD look like but am having trouble getting together a table of values to draw it with for myself. I have tried on my calculator but it keeps giving me a parallel line of y=1.5 (if that makes sense)
i know i must be putting it in wrong

HELP...!
 
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  • #2


What values are you putting in for x? Is your calculator in radian mode?
 
  • #3


ive been putting in 1/2*pi for x...yes it is in radians
 
  • #4


Well, if you always put in the same x, you will always get out the same y!

Put in a number of different values for x between 0 and [itex](1/2)\pi[/itex].
 

FAQ: Drawing graph of functions HELP

How do I plot a graph of a function?

To plot a graph of a function, you will need to determine the range of values for the independent variable (x) and then use the function to calculate the corresponding values of the dependent variable (y). Once you have a set of (x,y) coordinates, you can plot them on a graph with the x-axis representing the independent variable and the y-axis representing the dependent variable.

What is the purpose of drawing a graph of a function?

The purpose of drawing a graph of a function is to visualize the relationship between the independent and dependent variables. This can help in understanding the behavior of the function and identifying important characteristics such as maximum and minimum values, intercepts, and symmetry.

How do I choose a suitable scale for the axes?

The scale for the axes should be chosen based on the range of values for the independent and dependent variables. It should be evenly spaced and cover the entire range of values. If the range of values is large, it may be helpful to use a logarithmic scale to better visualize the data.

What is the difference between a linear and a nonlinear function?

A linear function is a function where the relationship between the independent and dependent variables is a straight line. A nonlinear function, on the other hand, is a function where the relationship between the variables is not a straight line. This can include curves, exponential functions, and trigonometric functions.

Can I use a graphing calculator to draw a graph of a function?

Yes, graphing calculators are a useful tool for drawing graphs of functions. They can quickly plot a large number of points and allow for easy adjustments to the scale and appearance of the graph. However, it is important to have a basic understanding of how to draw a graph manually in case a calculator is not available.

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