# help graphing

• Dec 2nd 2008, 01:40 PM
euclid2
help graphing
graph
a) $y= \sqrt x$

b) $y= 2\sqrt x$

c) $y= \sqrt 2x$
• Dec 2nd 2008, 02:47 PM
Jameson
Quote:

Originally Posted by euclid2
graph
a) $y= \sqrt x$

b) $y= 2\sqrt x$

c) $y= \sqrt 2x$

Once you work with these a few times, it'll become second nature.

Firstly, what is the domain of x? That is what values are restricted in all of these?

Once you figure that out, I would pick easy numbers to work with, meaning squares. Plot y(0), y(1), y(4), y(9) and you should start seeing the shape of the graph. The second two graphs are just variations of the first one.
• Dec 2nd 2008, 02:49 PM
euclid2
Quote:

Originally Posted by Jameson
Once you work with these a few times, it'll become second nature.

Firstly, what is the domain of x? That is what values are restricted in all of these?

Once you figure that out, I would pick easy numbers to work with, meaning squares. Plot y(0), y(1), y(4), y(9) and you should start seeing the shape of the graph. The second two graphs are just variations of the first one.

x cannot be zero and x cannot be a negative number, is this all?

how do I plot those, is it possible to make a table of values for these?
• Dec 2nd 2008, 02:56 PM
Jameson
Quote:

Originally Posted by euclid2
x cannot be zero and x cannot be a negative number, is this all?

how do I plot those, is it possible to make a table of values for these?

Almost. The square root of zero is zero. X cannot be less than zero. I was suggesting just making a T-chart like we all did when we first started graphing. Get a few points and connect the dots.

There are other ways to find information about the graph, but that is throw Calculus or some intuitive thinking. The general shape should be starting at zero, going steeply up and leveling out the farther out on the x-axis you go.
• Dec 2nd 2008, 03:08 PM
euclid2
Quote:

Originally Posted by Jameson
Almost. The square root of zero is zero. X cannot be less than zero. I was suggesting just making a T-chart like we all did when we first started graphing. Get a few points and connect the dots.

There are other ways to find information about the graph, but that is throw Calculus or some intuitive thinking. The general shape should be starting at zero, going steeply up and leveling out the farther out on the x-axis you go.

By T, you mean x,y chart, right?
So i can use the square root values 1,4,9, and 16 for x and the y values would be the square root of those so 1,2,3, and 4 correct?