Q15. - Algebra 1

Question

Describe how the graph of the given function is related to the graph of  

$$\begin{gathered} f\left(x\right)=x^2 \\ g\left(x\right)=x^2+3 \end{gathered}$$

Step-by-Step Solution

Answer

The graph of $g\left(x\right)=x^2+3$ is the graph of $f\left(x\right)=x^2$, vertically translated 3 units up.

Step 1. Define the standard form of the quadratic function.

A quadratic function, which is written in the form, $y=a{x}^2+bx+c$, where, $a\ne 0$ is called the standard form of the quadratic function.

Step 2. Define the transformations of the graph of the function.

(1) The graph of $f\left(x\right)+c$ shifts the graph of $f\left(x\right),c$ units up. 

(2) The graph of $f\left(x\right)-c$ shifts the graph of $f\left(x\right),c$ units down. 

Step 3. Describe how the graph of g x = x 2 + 3 is related to the graph of f x = x 2 .

Observe the equation $g\left(x\right)=x^2+3$.

The constant term is 3, so the graph is translated 3 units up.

Therefore, the graph of $g\left(x\right)=x^2+3$ is the graph of $f\left(x\right)=x^2$, vertically translated 3 units up.