Question

F(x) = 2x, find the ordered pair when x = 1. O (1,2) 0 (4,1) (2,1) O (1,4)​

Answer 1

The ordered pair is (1, 2) ⇒ A

Explanation:

In the function f(x) = y

• x is the domain of the function

• y is the range of the function

• The domain is all the x-coordinates of the points lie on the graph of the function

• The range is all the y-coordinates of the points lie on the graph of the function

That means any ordered pair (x, y) satisfy the function f(x) = y, lies on the graph of the function

∵ f(x) = 2x

→ That means y = 2x

∵ x = 1

→ Substitute the value of x in the function above

∴ f(1) = 2(1)

∴ f(1) = 2

→ That means at x = 1, y = 2

∴ The ordered pair is (1, 2)