how do you find the domain and range to (2,10),((3,15),(4,20)?

Answer 1

For a sequence of points:

Domain equals the x values {2, 3, 4}
Range equals the y values {10, 15, 20}

If you are talking about a function (e.g. a line or a curve), then the Domain is all possible input values (x) and Range is all possible output values (y). For example in the function y = x², your domain would be all real numbers (R) but the range would only be non-negative real numbers.

Answer 2

The domain is all of the possible x values. The range is all of the possible y values. If you are talking about a few points, then just use the (x, y) values. If you are referencing a line, then you may need to expand the domain and range to include all real numbers, or whatever the graph/function indicates.

Answer 3

When x=2 then y=10
When x=3 then y=15
When x =4 then y=20
For every increase in one unit of x there is increase in 5 unit of y. this means slope=5
y =5x +b
put (2,10)
10 =10 + b
b=0
y=5x
x can have any value therefore domain is all real values from - infinity to + infinity
y can have any value therefore range is all real values
from - infinity to + infinity

Answer 4

A function f consists of all ordered pairs of the form (x,f(x)), where x is in the domain of f and f(x) is the corresponding element of the range.

Therefore, if you are given the list of ordered pairs, the domain consists of all of the first elements in the ordered pairs. In this case, they are 2,3 and 4.

The range consists of all of the second elements in the ordered pairs: 10,15 and 20.

Answer 5

the domain is the x values, the range is the y values.

D={2,3,4} R={10,15,20}