Question

Select all of the following that are ordered pairs of the given function.

f(x)=3-2x

Answer 1

(-1,5), (0,3), (2,-1)

Explanation:

We can just test out each of the answers as follows:

Let's start with (-2,-1). We see that f(-2) = 3 - 2x(-2) = 3+4 = 7, so this is not a solution.

Now let's work out the rest:

f(-1) = 3 - 2x(-1) = 3 + 2 = 5. So yes (-1,5) is a solution

f(0) = 3-2x0 = 3 so yes, (0,3) is a solution

f(1) = 3 - 2x1 = 1 so (1,0) is not a solution

f(2) = 3 -2x2 = -1, so yes (2,-1) is a solution