Describe the graph of the inequality x2 + y2 ≤ 16.
◦ points inside and on the circle centred at the origin with radius 16
◦ points inside and on the circle centred at the origin with radius 4
◦ points on or outside the circle centered at the origin with radius 4
◦ points inside the circle centred at the origin with radius 4
◦ points on or outside the circle centred at the origin with radius 16