Question

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Answer 1

for B, you find the slope, change in y divided by change in x
you did that and got 22
if you put in the units (y is miles and x is hours)
you get 22 miles/hour
in other words 22 miles per hour.
does that remind you of anything ? i.e. speed.

Answer 2

the rate of change has units of miles/hour.
the clearest way to say it is , the average rate of change is the turtle's speed between hour 1 and hour 4

Answer 3

domain are the x values
x= 0 to ?
to find the upper limit, we use
y= 22 x + 5
and solve for x when y (distance) is 225
225= 22 x +5

Answer 4

y = 10?

Answer 5

the domain is the x values
to go 225 miles, it takes 10 hours as you just posted (but it's x not y)

0 <= x <= 10
or x=[0,10]

Answer 6

less than or equal because 10 is part of the domain
ditto for the 0

Answer 7

yes, or use \( \le\)