Question

1. If f(x) = 2x + 3, find f(4) and f(-1)f(-) = 2(-) + 3f(4) = 1 1So the ordered pair (₁) isincluded in the function f(x).fl-1)Date:Class:f( ) = 2( ) + 3f( ) =So the ordered pair (______) isincluded in the function f(x).

Answer 1

Part a.

In order to find f(4) we need to substitute the value x=4 into the given function, that is,

`f(4)=2(4)+3`

which gives

`\begin{gathered} f(4)=8+3 \\ f(4)=11 \end{gathered}`

Then, the ordered pair (4,11) is included in the function f(x).

Part b.

Similarly to the previous case, we need to substitute x=-1 into the function, that is,

`f(-1)=2(-1)+3`

which gives

`\begin{gathered} f(-1)=-2+3 \\ f(-1)=1 \end{gathered}`

So the ordered pair (-1,1) is included in the function f(x).