8th Grade Math Semester Exam Review

Front

What is π (Pi)?

Back

π (Pi) is an irrational number approximately equal to 3.141592654, which cannot be expressed as a fraction.

Front

In the equation y=mx+b, what does 'b' represent?

Back

'b' represents the Y-intercept, the point where the line crosses the Y-axis.

Front

How do you identify the y-intercept from a graph?

Back

The y-intercept is the point where the graph crosses the Y-axis, represented as (0, y).

Front

What is the equation for a rental truck that charges $20 plus $7.50 per hour?

Back

The equation is y = 7.5x + 20, where y is the total cost and x is the number of hours rented.

Front

What are rational numbers?

Back

Rational numbers are numbers that can be expressed as a fraction of two integers, where the denominator is not zero.

Front

What are irrational numbers?

Back

Irrational numbers cannot be expressed as a simple fraction; their decimal representation goes on forever without repeating.

Front

What is the slope in the equation y=mx+b?

Back

The slope 'm' represents the rate of change of y with respect to x, indicating how steep the line is.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

The slope is calculated as (y2 - y1) / (x2 - x1).

Front

What is the difference between the x-intercept and y-intercept?

Back

The x-intercept is where the graph crosses the X-axis (y=0), while the y-intercept is where it crosses the Y-axis (x=0).

Front

What does the term 'linear equation' mean?

Back

A linear equation is an equation that forms a straight line when graphed, typically in the form y = mx + b.