(0,0),(1,3)
slope = (3 - 0) / (1 - 0) = 3/1 = 3
y = mx + b
slope(m) = 3
y int (b).....this is when x = 0...u have point (0,0)...this means ur y int is 0
now sub
y = 3x + 0 which can be written as y = 3x <===
Answer:
Given that 1minute =3/7of the vessel
let the time taken in minutes to fill the whole of the vessel be' x' minute.
1min =3/7
xmin =whole vessel =1=7/7
=3x/7=1=x=7/3=2.3min=2min.3sec