Chapter 9 Quadratic Relations and Conic Sections - 9.3 Graph and Write Equations of Circles - 9.3 Exercises - Quiz for Lessons 9.1-9.3 - Page 632: 4

$$\left(4,\:\frac{3}{2}\right)$$

Using the distance formula, we find: $$\sqrt{\left(7-1\right)^2+\left(1-2\right)^2}\\ \sqrt{37}$$ Using the midpoint formula, we find: $$\left(\frac{7+1}{2},\:\frac{1+2}{2}\right)\\ \left(4,\:\frac{3}{2}\right)$$