STAAR Review

Front

What is a nonproportional relationship?

Back

A nonproportional relationship is one where the ratio between two quantities is not constant. In a graph, this is represented by a line that does not pass through the origin.

Front

How do you determine if a graph is proportional or nonproportional?

Back

A graph is proportional if it is a straight line that passes through the origin (0,0). If it does not pass through the origin, it is nonproportional.

Front

What is the formula for the volume of a sphere?

Back

The volume V of a sphere is given by the formula V = (4/3)πr³, where r is the radius.

Front

How do you find the radius of a sphere if you know the diameter?

Back

The radius r is half of the diameter d. So, r = d/2.

Front

What is the equation of a line in slope-intercept form?

Back

The slope-intercept form of a line is given by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

What does the slope of a line represent?

Back

The slope of a line represents the rate of change of y with respect to x. It indicates how steep the line is.

Front

What is the y-intercept in a linear equation?

Back

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

Front

How do you write an equation from a table of values?

Back

To write an equation from a table, identify the pattern in the changes of x and y values, then use the slope and y-intercept to form the equation.

Front

What is a linear equation?

Back

A linear equation is an equation that forms a straight line when graphed. It can be written in the form y = mx + b.

Front

What is the difference between fixed costs and variable costs in a linear equation?

Back

Fixed costs are constant and do not change with the level of output, while variable costs change with the level of output.