8th grade Math STAAR Practice Category 1 & 2

Front

What is a function in mathematics?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

How do you determine if a graph represents y as a function of x?

Back

A graph represents y as a function of x if any vertical line drawn through the graph intersects it at most once (Vertical Line Test).

Front

What is the formula for calculating the cost of fudge based on weight?

Back

Front

What does the slope of a line represent in a real-world context?

Back

The slope represents the rate of change; for example, in a faucet leak, it shows how many gallons are leaked per hour.

Front

What is a system of linear equations?

Back

A system of linear equations is a set of two or more linear equations with the same variables. The solution is the point where the graphs of the equations intersect.

Front

How do you find the solution to a system of linear equations graphically?

Back

The solution is found at the point where the graphs of the equations intersect, representing the values of the variables that satisfy all equations.

Front

What is the meaning of the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is 0.

Front

What is the rate of change in a linear relationship?

Back

The rate of change is the slope of the line, indicating how much y changes for a unit change in x.

Front

How can you interpret a table showing a linear relationship?

Back

A table showing a linear relationship will have a constant rate of change between the x and y values, indicating a linear function.

Front

What does it mean if a faucet leaks 0.8 gallons every 2 hours?

Back