The set below displays a relation between two sets. Identify all the elements of the domain and range.
Square
Nonagon
Purple
Hexagon
Green
Red
Circle
Octagon
Triangle
Blue
Yellow
Rectangle
Domain
Range
1 point
1
Question 2
2.
A social studies teacher has a collection of true/false questions she uses on tests. In her automatic quiz-maker program, each of these questions is connected with a correct answer, either "T" or "F".
A) Make a visual representation of the relation between questions and answers.
B) Explain whether or not the relation is a function.
1 point
1
Question 3
3.
From the relations below, select all and only the relations that are functions.
1 point
1
Question 4
4.
Evaluate f(15) and f(-5) for the function f(x)=\frac{4}{9}x-\frac{2}{3}.
1 point
1
Question 5
5.
Select the linear function that matches the input/output pairs shown below:
1 point
1
Question 6
6.
Which function matches the graph?
1 point
1
Question 7
7.
Laboratories with delicate instruments are often kept at "standard temperature temperature and pressure", 20 \textrm{ }^{\circ}\textrm{C} and 1 \textrm{ atm}. A small computer chip in a lab's thermostat is updated every 30 seconds with the current room temperature via a small wire. With another wire, it outputs either an "ON" signal or an "OFF" signal, depending on whether or not the current room temperature is below or above the target temp of 20 \textrm{ }^{\circ}\textrm{C}.
Which of the following statements are true about the relation between input temperature and output signal?