Find the distance between the points of the coordinate line: a) N (-4) and C (-9); b) A (-6.2) and P (0.7).

a) In order to find the distance between the points N (- 4) and C (- 9), you need to subtract another value from the value that is to the right on the coordinate line, that is, closer to the plus of infinity, which is to the left, that is, closer to minus infinity. Then we get: – 4 – (- 9);
We open the brackets. Since there is a minus sign in front of the brackets, when it is expanded, the signs of the values change to the opposite sign. That is, we get: – 4 – (- 9) = – 4 + 9 = 9 – 4 = 5;
b) A (-6.2) and P (0.7);
0.7 – (- 6.2) = 0.7 + 6.2 = 0.7 + 6 + 0.2 = 6 + 0.9 = 6.9.