Algebra 1 Keystone Module 2 Practice Test (2025)

Front

What is the range of a relation in a table?

Back

The range of a relation is the set of all possible output values (y-values) that correspond to the input values (x-values).

Front

What does it mean for a city to have a higher median?

Back

A city has a higher median if its median value (the middle value when data is ordered) is greater than that of another city.

Front

What is a function in mathematics?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

What does the equation y = 3x + 40 represent?

Back

This equation represents a linear function where 'y' is the number of stamps in Paul's collection after 'x' weeks, starting with 40 stamps and adding 3 each week.

Front

How do you find the value of a function at a specific point?

Back

To find the value of a function at a specific point, substitute the x-value into the function's equation and solve for y.

Front

What is the definition of a linear function?

Back

A linear function is a function that graphs to a straight line, represented by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope in the equation y = 3x + 40?

Back

The slope (m) in the equation y = 3x + 40 is 3, indicating that for every 1 unit increase in x, y increases by 3 units.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept is the value of y when x is 0, representing the starting point of the function on the y-axis.

Front

How can you determine if a relation is a function from a graph?

Back

You can use the vertical line test: if a vertical line intersects the graph at more than one point, the relation is not a function.

Front

What is the significance of the endpoints in a line segment on a graph?

Back

The endpoints of a line segment indicate the starting and ending points of that segment, which can affect whether a relation is a function.