Answer:
The correct statements are:
1. The first number in an ordered pair is the x-coordinate.
2. The second number in an ordered pair is the y-coordinate.
3. The graph of a linear equation is usually a line.
5. Ordered pairs are graphed as points in the coordinate plane.
Step-by-step explanation:
We know that any point or the ordered pair in the coordinate plane is represented by:
(x,y)
i.e. the first number in the ordered pair is the x-coordinate and the second number in the ordered pair is y-coordinate.
1)
The first number in an ordered pair is the x-coordinate.
This statement is correct.
2)
The second number in an ordered pair is the y-coordinate.
This statement is also correct.
3)
The graph of a linear equation is usually a line.
This is a correct statement since graph of a linear function is always a line i..e it has constant slope.
4)
Any set of ordered pairs is called a function.
This statement is incorrect.
( Since {(4,5) , (4,6), (5,1)} is never a function because there are two images of 4 which neglects the definition of function.
Since in a function there is a unique image of an object )
5)
Ordered pairs are graphed as points in the coordinate plane.
This statement is correct.
Since the ordered pair are nothing but points.
