A = (3,2)
B = (7,5)
The difference between x coordinates is 7-3 = 4, which squares to 4^2 = 16
The difference in y coordinates is 5-2 = 3 which squares to 3^2 = 9
add up the squares: 16+9 = 25
Then take the square root: sqrt(25) = 5
So the distance from A to B is 5 units
The length of segment AB is 5 units
The scale factor of 3 tells us to lengthen the segment by a factor of 3. In other words, triple the length
new length = (scale factor)*(old length)
new length = (3)*(5)
new length = 15
Answer: 15