Learn how to graph square root functions using a table of values.
A powerpoint on the basics of graphing square root functions, and then examples. Be familiar with making a table of values, and properties of square roots.
The graph of a square root function (y =√x) looks like this:
...this packet will show you why, and how to create your own graphs!
The DOMAIN is all of the possible x values
The RANGE is all possible y values
I just think of this as where the x or y part of the line is.
*To help remember which one is which (whether domain or range goes to x or y), just think about your friend RAY and his range. The y from Ray's raYnge matches up to the y on the graph.
For square root functions, both the domain and range will extend into infinity, because the line will continue on forever (on graphs, we can only show a portion)
In the basic graph, the domain is greater than or equal to 0, and the range is also greater than, or equal to 0
Watch out, the beginning will change depending on where the particular graph starts!
One phrase your teacher might use is Radical Expression.
A radical expression is everything under the square root symbol.
in the equation
y = √ (3x + 2)
(3x + 2) is the radical expression
A slide show on the basics of graphing square root functions.
Try out this problem:
y = √ (2x + 16) + 4
Grab a piece of paper and graph the equation!
(P.S. some easy x-values are: -8, -7.5, -6, -3.5, and 0)