Answer:

Step-by-step explanation:
Slope-intercept form equation is given as 
Where,
y = distance remaining
x = hours driven
m = slope/constant rate. In this case, the value of m would be -65. This means the distance will reduce at a constant rate of 65 miles per hour.
b = y-intercept, which is the initial value or the distance between the cities = 420
Plug in the values into the slope-intercept equation, to represent the distance y in miles remaining after driving x hours. You would have:

Answer:
y = 2x+6
Step-by-step explanation:
y-4=2(x+1)
Distribute
y-4 =2x +2
Add 2 to each side
y-4+4 = 2x+2+4
y = 2x+6
This is in slope intercept form
y = mx+b where m is the slope and b is the y intercept
Answer:
It is not a function.
Step-by-step explanation:
Using the verticals line test you can tell the relation is not a function because two number are the same in the x-value. This can be easily seen with the two points on the same vertical line.
45 degrees. A right triangle is 90 degrees so 90-45=45.