### Home > CCA2 > Chapter Ch7 > Lesson 7.1.5 > Problem 7-84

7-84.

Sketch a graph of *x*^{2} + *y*^{2} = 100. Homework Help ✎

Is it a function?

What are its domain and range?

Draw a central angle that measures

radians. If you remove this wedge of the circle, how much area remains?

Does each *x*-value on the graph of the function have only one corresponding *y*-value?

Domain: −10 ≤ *x* ≤ 10

Range: −10 ≤ *y* ≤ 10

See the unit circle graph at right.

What portion of the circle is shaded?

Since