Find the distance between the points of the coordinate line: a) F (-15) and N (3 b) b) B (-4.6) and C (7.82)

The distance between points on the coordinate line is found by the formula:
d = / x1-x2 /,
where x1 and x2 are the coordinates of points on the coordinate line.
a) Given: F (-15); N (3); d (FN) =?
Then x1 = -15 and x2 = 3. Substitute the values x1 and x2 into the formula:
d (FN) = / – 15-3 / = / – 18 / = 18.
Answer: 18.
b) Given: B (-4.6); C (7.82); d (BC) =?
Then x1 = -4.6 and x2 = 7.82. Substitute the values x1 and x2 into the formula:
d (BC) = / – 4.6-7.82 / = / – 12.42 / = 12.42.
Answer: 12.42.