We need the graph of the function:
[tex]f(x)=4x[/tex]
Comparing with the slope-intercept line function:
[tex]f(x)=mx+b[/tex]
Where the slope is m and the y-intercept (the point where the line crosses the y-axis) is b.
In this case:
[tex]\begin{gathered} m=4 \\ b=0 \end{gathered}[/tex]
m=4 means that each step the graph advances 4 in y (vertical direction) and 1 in x (horizontal direction)
and b=0 means that the graph crosses the y-axis at y=0 --> the origin
The graph is as follows:
