Answer:
k = 4
Step-by-step explanation:
The graph represents y and x in direct proportion with equation
y = kx ← k is the constant of proportionality
To find k use the point (1, 4), that is x = 1, y = 4
k = [tex]\frac{y}{x}[/tex] = [tex]\frac{4}{1}[/tex] = 4
