Determine the domain and range of each relation

a) { (1,2), (3,4), (5,6) }

b) 3x + 4y = 12

c) y = √x+4

A) The domain are the x values of the system. So here the x coordinates are: 1, 3, and 5.

b) This equation is a linear equation because x is raised to only one power and it has nothing in the denominator. The domain of any linear equation is all real numbers.

c) For a square root, first set the expression to greater than or equal to 0.
The solve for x.   


a) 1, 3, and 5
b) all real numbers
c)

Just divide the x axis (the top) by 2 or multiply the y axis (the bottom) by 2