Domain and Range of a Function and Relation G7

Introduction:

The domain of a relation and function are those values of x over which the function and relation is defined. The range are the y values over which the function and relation is defined.

Example 1: state the domain and range of S equals all points ( x,y) such that (1,-2), (3,4) , (5,-7).
Solution 1: x equa”s 1,3,5 and the range is y equals -7,-2,4. .

Example 2: find the domain and range of y equal x and y equals -2.’.
Solution 2: domain: no restrictions on x or y are given so the domain is all real numbers and the range is also all real numbers. For equals -2, the domain is all reals and the range is -2.

Example 3: find the domain and range for y equals square root of 2 x.
Solution 3: the domain is x greater than or equal to 0. The range I is y is greater than or equal to 0. It is a square root function.

Conclusion:

You should be able to find the domain and range of a set of points, a circle, a square root, a horizontal line or a straight line.