Question

ok so in my previous question with all the functions, I know have all the points I need to graph, how do I find the domain and range?

Answer 1

@jim_thompson5910 and @Luigi0210 I trust you guys, isn't the domain all the first numbers in the coordinates I have, and the range is all the second ones?

Answer 2

the domain is the set of allowed x values or inputs

Answer 3

so if you're dealing with a set of points, then the domain is the x coordinates of each point given

Answer 4

for example if some coordinates I had were (1,2) (2,3) (6,9)
my domain would be 1,2,6
my range would be 2,3,9
correct?

Answer 5

if those were all of your points in the function, yes

Answer 6

they say to use the graph to determine the domain and range, but I can just use the points/ coordinates right?

Answer 7

and the range would be all the y coordinates?

Answer 8

if I remember correctly :)

Answer 9

yes you are correct

Answer 10

yay thanks :)

Answer 11

if you think of every possible point on a function, then the domain is just the set of all the x coordinates of each point

so this goes back to something like 1/(x^2-25) where x = 5 or x = -5 didn't work since they are not part of any point on the graph

Answer 12

same for the range

Answer 13

yw