It's a line in form y = mx.
Two points:
(0, 0) and (1, 4)
The formula of a slope:
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
Substitute:
[tex]m=\dfrac{1-0}{4-0}=\dfrac{1}{4}[/tex]
Answer: [tex]y=\dfrac{1}{4}x[/tex]
