I = PRT
21 = 200 * 0.035 * T
21 = 7T
3 years = T
        
             
        
        
        
You forgot to provide the slope but here is how you do this 
the slope 5 = (y2 - y) / (x2 - x) but we know that (x2, y2) = (-10, -5) 
=> (-5 - y) / (-10 - x) = 5 --- multiply both sides by (-10 - x) 
=> (-5 - y) = 5 (-10 - x) 
=> (-5 - y) = -50 - (5)x --- add +5 to both sides 
=>  -y = (-50 + 5) - (5)x --- multiply both sides -1 
=> y = 5x + 45  --- this will be your equation. 
        
             
        
        
        
Answer:
the Bision is 10 miles / hour faster if he could keep it up
Step-by-step explanation:
There are 60 minutes in an hour.
Therefore the bison can run [3520 feet / min] * [60 min ] =211288 feet in an hour.
Now you have to convert 212200 to miles. Do this by dividing by 5280
212200/5280 = 40 miles.
Kind of hard to believe isn't it. 40 miles is a long way when you are running it.
The bison is faster by 10 miles / hour.
This can be done all in 1 step if you know how to do dimensional analysis
3520 feet / minute * [ 60 min/ hour ] * [ 1 mile / 5280 feet] = 40 miles