8th Grade Math STAAR Review

Front

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

Back

The slope of the line.

Front

What is the formula for finding the slope between two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does it mean for a transformation to be congruent?

Back

The shape and size remain the same after the transformation.

Front

What is the result of dilating a point (x,y) by a scale factor of k?

Back

The new coordinates are (kx, ky).

Front

What is the y-intercept of a linear equation?

Back

The point where the line crosses the y-axis, where x=0.

Front

What is the effect of reflecting a point across the x-axis?

Back

The y-coordinate changes sign, resulting in (x, -y).

Front

What is a translation in geometry?

Back

A transformation that moves every point of a shape the same distance in a specified direction.

Front

What is the distance formula between two points (x1, y1) and (x2, y2)?

Back

Distance = √((x2 - x1)² + (y2 - y1)²).

Front

What does the term 'dilation' refer to in geometry?

Back

A transformation that alters the size of a shape but not its shape.

Front

What is the definition of a linear function?

Back

A function that graphs to a straight line, typically in the form y=mx+b.