6. Loren found that a copy machine makes 250 copies in 2 1/2 minutes, giving a constant of proportionality of 1/100. What equation could Loren use to determine the number of minutes, m, necessary to make c copies?​

The equation of a circle is defined by (x – h)² + (y – k)² = r² with the center being at (h, k) and with radius r. This circle, which is centered at (0, 0) and has r = 5 has an equation of x² + y² = 25. So we can plug in the ordered pairs:
(2, 4.79)
(2)² + (4.79)² = 25
4 + 22.94 = 25
26.94 = 25 is not true

(2, 4.58)
(2)² + (4.58)² = 25
4 + 20.97 = 25
24.97 = 25 this can be rounded to 25 = 25.

(2, 1)
(2)² + (1)² = 25
4 + 1 = 25 is not true.

(2, 3)
(2)² + (3)² = 25
4 + 9 = 25 is not true.

So the right answer is (2, 4.58). Hope that helps.