# Question #d8ad3

##### 1 Answer

Jun 10, 2017

#### Explanation:

When 'reading' a graph in '2-space' (x and y axis) then you always read left to right on the x-axis

Let point 1 be

Let point 2 be

Let the direct distance from

The link between Pythagoras and the distance between two points is due to the triangle depicted in the graph below:

Thus we have: