Correct answer gets brainliest and full ratings.

5x−y=7

The general slope-point form for a line is 

y−b=m(x−a)

for a slope of m and a point (a,b)

For the given slope m=5 and point (a,b)=(2,3)

y−3=5(x−2)

While this is valid answer, we could convert it into standard form:

y−3=5x−10

y=5x−7

5x−y=7

So in this Case, The Correct Answer would be 100%: "y−3=5x−10" OR in Other Words, Option "B".

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: