Let's say that d is distance, and the formula is as follows;
d=\(\sqrt{(x_{2}- x_{1} ) ^{2}+ (y_{2}- y_{1} ) ^{2}\)
This means that with the values filled in we have an equation that looks like;
\(d= \sqrt{(7-1)^{2}+(-7-1)^{2}}\)
Therefore solving would look like;
\(d= \sqrt{(7-1)^{2}+(-7-1)^{2}}
d= \sqrt{(6)^{2}+(-8)^{2}}
d= \sqrt{36+64}
d= \sqrt{100}\) or 10
