Question

What is the distance between the points (−7, 7) and (−7, 8) ?

あ：１unit
い：７units
う：８ units
え：１５ units

Answer 1

The distance between those two points is あ.

Answer 2

Distance formula:

(sqrt) (x2-x1)^2+(y2-y1)^2

Plug in the points.

(sqrt) (-7-(-7)^2+ (8-7)^2

Combine like terms.

(sqrt) (0)^2+ (1)^2

(sqrt) 0+ 1

(sqrt) 1

1

1 is the distance.

I hope this helps!
~cupcake