Need help on two questions, Will give medal!

Use the Distance Formula and the x-axis of the coordinate plane. Show why the distance between two points on a number line (the x-axis) is | a – b |, where a and b are the x-coordinates of the points.

Question

Need help on two questions, Will give medal!

Use the Distance Formula and the x-axis of the coordinate plane. Show why the distance between two points on a number line (the x-axis) is | a – b |, where a and b are the x-coordinates of the points.

er.mohd.amir · Answer

on x-axis y coordinate is zero

anonymous · Answer

okay? i dont really understand what it's asking. can you explain?

anonymous · Answer

sorry it took so long

er.mohd.amir · Answer

distance formula d=sqrt{(x2-x1)^2+(y2-y1)^2} 
where (x1,y1) and (x2,y2) are coordinates
here in Q y is zero so d=sqrt (x2-x1)^2
let points (a,0) and (b,0)
then d=|b-a|