Find the y-intercept of the line on the graph.

(0, 4)

Step-by-step explanation:

The y-intercept is the y-value when x = 0.

From the graph, we see that when x = 0, y = 4.

The graph in the attached figure

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem the given line represent a proportional relationship, because passes through the origin

we have

--->  the constant of proportionality k is equal to the slope

substitute

The linear equation is

To draw a line we need two points

we have (0,0)

To find the other point

assume  x=3 and substitute in the equation to solve for y

so

The other point is (3,4)

using a graphing tool

Plot the points (0,0) and (3,4)

To graph the line join the points

see the attached figure