GIVEN:
We are given two points on a line and these are;

Required;
We are required to determine the slope of the line passing through these points.
Step-by-step solution;
The slope of a line is given by the formula;

The variables are;

We can now substitute these into the formula and then simplify;

ANSWER:
The slope of the line passing through the given points is;
Answer:
QR is equal to 5 since 13 is 5 less that 18. So since 13 was already taken, that leaves 5