### Home > CCA > Chapter 9 > Lesson 9.3.1 > Problem 9-74

9-74.

Thui made the following hypotheses: . Which of the following conclusions can she make?

Find the boundary points of the two equations.

Boundary points

Test numbers on all sides of the boundary points.

Test

True False

Test

True True

Test

False True

Because is the only test that makes both equations true, (b), or