Answer:

Step-by-step explanation:
Slope of the line is determined by 
The rise can be calculated by taking the y coordinates of 2 points and subtracting them.
The run can be calculated by taking the x coordinates of 2 points and subtracting them.
so


slope = 
3c - 15 = 90
3c = 105 (add 15 to 90)
c = 35 (divide by 3)
Understand?
Answer:
Option B is correct.
Initial amount (a) = 30 and growth factor(b) = 8.3
Step-by-step explanation:
An exponential function is of the form:
....[1]
where
a represents the initial amount
b represents the growth factor and x is the variable
Given the function: 
On comparing given equation with [1] we get;
a = 30 and b = 8.3
Therefore, the initial amount(a) = 30 and growth factor(b) = 8.3
Answer:12,450
Step-by-step explanation: Since the climber descends to meet a fellow climber by 200 ft you are going to subtract so the equation is going to be 12,740-200 ft so what does that equal it equals 12,540 ft because it is only subtracting 740-200 ft so 740-200=540 so your answer would more likely be 12,540 not the negative answer.