The given equation is in point-slope form.
The general form of an equation in point slope form is:

Here m is the slope and

and

are the coordinates of the point.
So in given equation the slope is 2/3, and the coordinates of point are (1,3)
It's 4/3 because of the distance formula
Answer:
9000 ft
Step-by-step explanation:
Given: A airplane is ascending at a constant rate of 15 feet per second,
What we need to know: The change in altitude during 10 minutes of flight,
60 seconds = 1 minute
60 × 10
= 600 seconds
600 × 15
= 9000 ft
Therefore there was a 9000 ft change in altitude during the 10 minutes of the flight.
(2 × (6cm x 9cm)) + (2 × (6cm x 5.1cm)) + (2 × (9cm x 5.1cm)) = 261 square cm