The slope is given by $ \frac{y1-y2}{x1-x2}$
If the slope is given we can also calculate the value of x2.
slope= $ \frac{y1-y2}{x1-x2}$
x1-x2= $\frac{y1-y2}{slope}$
x2=x1-$ \frac{y1-y2}{slope}$
Suppose a triangle we have traingle image here so when we move from y1 to y2 the value of x coordinate is changed to x2 which is greater than x1 but when i used the above formula to find value of x2 its giving me a value which is less than x1.
Why its so?