Answer:
Concept:
The formula to calculate the distance between two points is given below as
[tex]d=\sqrt[]{(y_2-y_1)^2+(x_2-x_1)^2}[/tex]The coordinates given in the question are
[tex]\begin{gathered} (x_1,y_1)\Rightarrow(6,8) \\ (x_2,y_2)\Rightarrow(-1,8) \end{gathered}[/tex]By substituting the values in the formula above, we will have
[tex]\begin{gathered} d=\sqrt[]{(y_2-y_1)^2+(x_2-x_1)^2} \\ d=\sqrt[]{(8-8)^2+(-1-6)^2} \\ d=\sqrt[]{0^2+(-7)^2} \\ d=\sqrt[]{0+49} \\ d=\sqrt[]{49} \\ d=7 \end{gathered}[/tex]Hence,
The distance = 7 units
