Grade 8th Math STAAR Practice Test

Front

What is the slope of a line in a graph?

Back

The slope of a line represents the rate of change of a quantity. It is calculated as the rise (change in y) over the run (change in x).

Front

How do you calculate simple interest?

Back

Simple interest is calculated using the formula: I = PRT, where I is the interest, P is the principal amount, R is the rate of interest per year, and T is the time in years.

Front

What is a function in mathematics?

Back

A function is a relation that assigns exactly one output for each input. In a function, no two ordered pairs can have the same first element.

Front

How do you determine the remaining cost after a scholarship?

Back

To find the remaining cost, subtract the scholarship amount from the total cost. Remaining Cost = Total Cost - Scholarship.

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two variables by displaying data points on a Cartesian plane.

Front

What does it mean for a table to represent y as a function of x?

Back

A table represents y as a function of x if each x-value corresponds to exactly one y-value.

Front

How do you find the minimum monthly earnings needed to cover a cost?

Back

To find the minimum monthly earnings, divide the remaining cost by the number of months until the payment is due.

Front

What is the total cost of attending a community college if scholarships and loans are considered?

Back

Total Cost = Annual Cost - Scholarship - Loan.

Front

How do you interpret the slope of a graph in a real-world context?

Back

The slope indicates how much one quantity changes in relation to another. For example, in a leak, it shows how many gallons are lost per hour.

Front

What is the significance of the y-intercept in a linear graph?

Back

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