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Graphing of exponential functions

I have the graphs, I just have questions. I don't understand how these graps were formed. Please explain how this is done. Where do the lines intersect? Aren't there coordinates? I do not understand at all. Sorry, I am a math retard!! Thanks for your help.

1. f(x)=6x
2. f(x)=3x - 2
3. f(x)=(1/2)x
4. f(x)= log2x


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1. f(x)=6x

( I will give a detailed explanation for the first problem. This will help you understand the other two as well. I will give shorter explanations to the other two problems. Highlighted phrase is important to understand)
You only need the general shape of the graph. So you will analyze the given function at extreme values of x to get the general ...

Solution Summary

How to plot graphs without using a graphing utility? That is the question that I have answered in this problem set. I have used several examples involving exponential functions and logarithmic functions to show how one can analyze the functions to draw their graphs without using a graphing utility. Understanding how to plot/sketch graphs is very important in the field of mathematics and other sciences and this solution will give you a head start on learning that.