Q21. - Algebra 1

Question

Graph each function. Find the y-intercept, and state the domain and range.

$y=3x+2$

Step-by-Step Solution

Answer

The graph of the function is:

y-intercept is $\left(0,2\right)$ and domain and range both are all real numbers.

Step 1. Graph the equation .

Graph of the function: $y=3x+2$

Step 2. Find the y -intercept .

The y-intercept of a graph is the point where the graph intersects the y-axis that is., x-coordinate of a y-intercept is 0. So, to find y-intercept substitute 0 for x into the equation $y=3x+2$.

 

 $$\begin{gathered} y=3x+2 \\ =3\left(0\right)+2 [x=0] \\ =2 \end{gathered}$$

 

Thus, y-intercept is $y=2$.

Step 3. Find the range and domain.

The domain of a function $f\left(x\right)$ is the set of all values for which the function is defined, and the range of the function is the set of all values that f takes.

From the graph, it can be concluded that domain and range both are all real numbers.