How do i find the domain and range of an equation? Lets say my equation is y=2x+4. What would be my domain and range? I know it goes in this form but I dont know wat to put. #>x<#
2006-11-15 12:38:58 · 3 answers · asked by JJcD 4 in Science & Mathematics ➔ Mathematics
lets say im gonna graph it. Is the domain where the line starts and ends.
2006-11-15 12:49:37 · update #1
In this case, the domain is all real numbers, because you can use any number for x. And the range is all real numbers, because you can find an x that will produce any real number y. So you write the domain and range as follows:
D = {x€R} (€ is the nearest I can find to the symbol for "is an element of")
R = {y€R}
or you can say
-∞
Hope that helps.
2006-11-15 12:46:28 · answer #1 · answered by just♪wondering 7 · 0⤊ 0⤋
THe domain and range for that equation is the set of all real numbers. You just have to learn from experience how to find domain and range. Graphing the equation always helps.
2006-11-15 20:45:35 · answer #2 · answered by Megan M 2 · 0⤊ 0⤋
You don't have any restrictions with that equation so for both x and y it would be all real numbers.
If it was something like f(x)=|x+2| then the range would be y is greater than or equal to 0 and all real numbers for the domain. If you graph it you'll find out why. ^_^
2006-11-15 23:16:31 · answer #3 · answered by Teh Link 1 · 0⤊ 0⤋