Question

How do you find the distance between (7, 7) and (–7, 7)?

Answer 1

The distance is 14. You can see it on the plan: the two points are at the same height, both 7 units far from the origin. Otherwise, using the formula:
`d(x,y)=\sqrt{(x_1-y_1)^2 + (x_2-y_2)^2}`. In your case, `x_1=x_2=y:2=7`, and `y_1=-7`. Thus, you have
`d(x,y)=\sqrt{(7+7)^2 + (7-7)^2}=\sqrt{14^2}=14`