Answer:

Step-by-step explanation:
In order to solve this equation we should know the format of slope-intercept form, which is: 
Given you already have the y-intercept and slope for the line, it's a matter of plugging in the slope for the "m" variable slot and the y-intercept into the "b" variable slot.
This is turn gives us our equation: 
Hope this helped! If you have any questions feel free to ask!
The answer is B
Explanation: you start with 177.25 the total and subtract 7.5. Then you grab 169.75 and divide by 5. Getting you 33.95
30 mph for 0.5 hrs = 15 miles
80 mph for 2 hours = 160 miles
160 +15 = 175 miles total
So you subtitute into the equation
so T=RH
if R=10 and H=35
so 10 per hour so
10 times 35 or (R times H)
so 350=T
b.
if is R=12 and H=40
subsitute and get
12 times 40 (RH) which is
480=T