Provide an appropriate response.y = -xy = -x + 5y = -x - 5Graph the set of equations on the same grid. Compare the slopes, y-intercepts, and their effects on the graphs.
What will be an ideal response?
Answers may vary. One possibility:
For all three lines, the slope is -1. Thus, they are parallel and do not intersect. In addition, they all slope downhill from left to right. The y-intercept of 
is (0, 0), the y-intercept of 
is (0, 5), and the y-intercept of
is (0, - 5). The graph of 
looks like the graph of 
shifted up 5 units. The graph of 
looks like the graph of 
shifted down 5 units.
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Classify the polynomial by the number of terms. Then identify the degree of the polynomial.
r3 + 
s2
A. Trinomial of degree 2 B. Binomial of degree 1 C. Binomial of degree 5 D. Binomial of degree 3
Give a geometric description of the set of points whose coordinates satisfy the given conditions. x2 + y2 + z2 > 16
A. All points in space B. All points on the surface of the cylinder with radius 4 C. All points outside the cylinder with radius 4 D. All points outside the sphere of radius 4
Solve the proportion.
Solve the problem.The function f(x) = 200(0.5)x/90 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 225 pounds B. 147 pounds C. 42 pounds D. 44 pounds