How do you get the domain and range of the graph by just looking at the graph plainly?
Please help. My mathematics periodical exam is tomorrow.
2007-08-14 22:11:52 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Using RULE method! Not ROSTER method please!
2007-08-15 00:40:55 · update #1
It's simple. Just look at the graph of the function, and pay attention to the x and y coordinates of each dot on the curve.
All the x coordinates make up the domain. All the y coordinates make up the range.
2007-08-14 22:21:57 · answer #1 · answered by mathkid 2 · 0⤊ 0⤋
If the graph turns back on it's self you can see that one or the other only goes so far in at least one direction. Example: A parabale about the y-axis has a domain infinite in both directions but the range stop at the minimum. For a straight line both domain and range take all real numbers.
2007-08-15 05:24:47 · answer #2 · answered by vann_robert 3 · 0⤊ 0⤋
The domain is the set of all x values that has an associated y value, i.e. if you draw a verticle line through an x value and it interscects the graph then that x value is in the domain.
The range is the same thing with y values. A value y is in the range if a horizontal line drawn through it intersects the graph.
What's with the thumb down? This is strictly a graphical solution.
2007-08-21 22:47:56 · answer #3 · answered by rrsvvc 4 · 0⤊ 0⤋
The domain is the thing that you insert into an equation and your range is your result. This corresponds to a graph with your domain being the x-axis and your range is the y-axis.
Example: y=mx + b
hope this helps. GOOD LUCK! =)
2007-08-15 05:24:18 · answer #4 · answered by Ericka 1 · 0⤊ 1⤋
On the graph, the domain is where the curve is continue, whithout breaks. The range is interval between the beginning and the end of the curve
2007-08-15 05:21:31 · answer #5 · answered by maussy 7 · 0⤊ 1⤋
look at the graph.
see from where to where on the x-axis the graph exists. this is the domain.
see from where to where on the y-axis the graph exists. this is the range.
2007-08-15 06:15:19 · answer #6 · answered by Bhaskar 4 · 0⤊ 0⤋
Domain is the horizontal sweep and Range is the vertical plot w.r.t the domain.
2007-08-22 06:19:41 · answer #7 · answered by Harihara S 4 · 0⤊ 1⤋
you get domain from x-aixes[from the start point of graph to end point]
Range from y-aixes
2007-08-15 05:20:32 · answer #8 · answered by Anonymous · 0⤊ 0⤋