Answer:

Step-by-step explanation:
Notice when x increases 1, y is 4 times the previous one, so
the function is like 
To determine the constant C, put any pair of (x, y)
Use x = 0, y = 0.2, so
0.2 =
= C * 1 = C
then 
I say left because you have a straight line, i goes through 0,0 and every time it goes over 1 and up by 3.
Answer:
She tips the waiter 25.5 dollar.
Step-by-step explanation:
If the dinner cost 85 you multiply by .30 and you get 25.5. If you wanna find out whole cost after subtract 25.5 from 85.
Because the initial value is $26.40, the line must pass through this when x is 0. Thus, the answer is either the first or the second equation.
Next, we calculate the difference between the year 2019 and 1998 and substitute it into the value of x.
2019 - 1998 = 21.
Substituting this into the equation:
y = 1.006(21) + 26.40
y = $47.52
Thus, the first option is correct.