Answer: B
Step-by-step explanation: put the points on a graph
Answer:
For x∈ {-∞,-3} y<0, below x-axis
x∈ {-3,-1} y>0, above x-axis
x∈ {-1,4} y<0, below x-axis
x∈ {4,∞} y>0, above x-axis
Step-by-step explanation:
f(x)=
=0
survey a specific amount of students and ask then if they spend les that 2 hours a night of studying or 2 or more hours a night studying.