Hey there! I happy to help!
Here's how to find the distance between any two points.
Find the difference between the x values.
-4-3=-7
Square it.
-7²=49
Find the difference of the y values.
6-(-7)=6+7=13
Square that.
13²=169
Add up the two numbers you got.
169+49=218
And square root it.
√218≈14.76.
Have a wonderful day! :D