What? What do you need help with?
Answer:

Step-by-step explanation:
The graph shows a negative slope with 3 units in between each point.
Every 3 x-units, the y-unit goes up once.
Answer:
y=-1/4x+6
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(5-6)/(4-0)
m=-1/4
y-y1=m(x-x1)
y-6=-1/4(x-0)
y-6=-1/4(x)
y-6=-1/4x
y=-1/4x+6