For friends went out to dine together. Prior to the tip being added, the dinner bill was for $140. With the tip added-in, the dinner bill was equally shared by the four friends, each person's share being $42. How much was the tip as a percentage of the initial bill amount?

16.67 %

Step-by-step explanation:

140 / 4 = 35

42 - 35 = 7

7 x 4  = 28

140 + 28 = 168

140 / 168 = 5/6

1 - 5/6 = 1/6

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.