Answer:
D) 
Step-by-step explanation:
Given pair of sunglasses cost
dollars.
Now,
Increase the price of the sunglasses by 

Price of sunglasses increased by 
So, we will add
to 
That yields 

Answer:
0.8 miles
Step-by-step explanation:
0.2 x 4 = 0.8
Y = mx + b
m = (y2 - y1)/(x2 - x1)
y = (26,600 - 18100)/(20 - 10)x + b
y = 850x + b
18100 = 850(10) + b
b = 9600
R(x) = 850x + 9600
I believe it is corresponding to the value of x in type of situational problem.