Question

Assume the point (10,20) belongs to the function f of x what point belongs to y=2f (x)

Answer 1

(10,40)

Step-by-step explanation

Step 1

`\begin{gathered} y=f(x) \\ (10,20)\rightarrow y=f(x)\rightarrow20=f(10) \\ 20=f(10) \end{gathered}`

Step 2

now

`\begin{gathered} y^(\prime)=2\cdot f(x) \\ y^(\prime)=2\cdot f(10) \\ y^(\prime)=2\cdot20 \\ y^(\prime)=40 \\ \text{then} \\ (10,40) \end{gathered}`