Variables-Visuals

What is the name of the variable in the image?

• age
• value
• datatype
• variable_name

Answer explanation

The answer is age, because the image shows a Java variable declaration. The variable declaration is int age = 20;. The age keyword is the name of the variable, the int keyword is the datatype of the variable, and the 20 is the value of the variable.

What is the difference between discrete and continuous numbered values?

• Discrete values can only take certain values, while continuous values can be any number within a particular range.
• Discrete values are measured, while continuous values are not.
• Discrete values are whole numbers, while continuous values can be decimals.
• Discrete values are used for counting, while continuous values are used for measuring.

Answer explanation

The answer is discrete values can only take certain values, while continuous values can be any number within a particular range, because the image shows a diagram that illustrates the difference between discrete and continuous numbered values. The discrete values are represented by the dots on the number line, and the continuous values are represented by the shaded area. The dots on the number line represent values that can only be taken, while the shaded area represents values that can be any number within a particular range.

What letter is represented in the image?

• X
• Y
• Z
• A

Answer explanation

The answer is X, because the image shows a green and black monogram with the letter X. The letter X is the only letter that is represented in the image.

What is the relationship between the independent variable (IV) and the dependent variable (DV)?

• Causal
• Spurious
• No relationship
• Cannot be determined

Answer explanation

The answer is spurious, because the image shows a diagram of a causal relationship between an independent variable (IV) and a dependent variable (DV), but the relationship is actually spurious. The spurious relationship is caused by a confounding variable, which is a third variable that is correlated with both the IV and the DV.

What is the rate of increase in the graph?

• 2
• 4
• 6
• 8

Answer explanation

The answer is 4, because the graph shows a line that increases by 4 units for every 1 unit increase on the x-axis. This means that the rate of increase in the graph is 4.

What is the name of the programming language in the image?

• Python
• Java
• C++
• JavaScript

Answer explanation

The answer is Python, because the image shows a code snippet in Python.

What are the two variables in the image?

• bar, foo
• set_variables_1
• WIDGET NAME
• Undefined

Answer explanation

The answer is bar and foo, because the image shows a screenshot of a Twilio Studio Set Variables widget. The widget has two input fields, one for the variable name and one for the variable value. The variable name is bar and the variable value is foo.

What is the type of variable in the image?

• Numeric
• Boolean
• String
• Undefined

Answer explanation

The answer is String, because the image shows a screenshot of a Twilio Studio Set Variables widget. The widget has one input field, and the input field is for a string variable. The variable value is "This is a string".

What is the name of the data type of the variable age?

• String
• Integer
• Float
• Boolean

Answer explanation

The answer is Integer, because the image shows a Java variable declaration. The variable declaration is int age;. The int keyword is the datatype of the variable, and it specifies that the variable is an integer.

What is the lurking variable in the image?

• Temperature
• Time of year
• Ice cream sales
• Shark attacks

Answer explanation

The answer is Temperature, because the image shows a scatterplot of ice cream sales and shark attacks. The scatterplot shows that there is a positive correlation between ice cream sales and shark attacks. However, the correlation is not causal. The lurking variable is temperature. Temperature is correlated with both ice cream sales and shark attacks. When temperature is high, people are more likely to buy ice cream and sharks are more likely to attack.