Using the distance formula, find the distance between the points (9,5) and (6,5). If necessary round to the?

Question

nearest tenth?

A. 3
B. 4
C. 5
D. 6

Answer 1

Uhm...

9 - 6 = 3

You weren't kidding, were you?

Answer 2

In general:
Calculate the change in X and the change in Y
Square each and add them
Take the square root

However, this problem has no change in Y, so the answer is easy: Just take the absolute value of the change in X. Note that if you do it the long way you get the same answer

Answer 3

Use dist. formula


Distance = sqrt[ (x2-x1)^2 + ( y2-y1)^2 )
= sqrt[ ( 9-6)^2 + (5-5)^2 ]
= sqrt [ 3^2 + 0 ]
=sqrt[ 9]
=3

Ans: A. 3 units