The value of x is and the value of y is

Since the slope is 2/3, for every time the x-value increases by 1
the y-value increases by 2/3. 

The answer to x is found by finding the difference between 3 and 5, which is 2.
2/3 goes into that 3 times. 
So subtract 2 from -2 to get -4. 
The x-value is -4. 

The answer for the y-value is given earlier: 
the original point of (-2,5). 
The y-value is 5. 

Hope this helps!

Yes i could be the length of the triangle