Review of Unit 4 Algebra

Front

What is the equation of a horizontal line?

Back

y = b, where b is a constant.

Front

What is the equation of a vertical line?

Back

x = a, where a is a constant.

Front

What does the slope of a line represent?

Back

The rate of change of y with respect to x.

Front

What is the slope of the line represented by the equation y = mx + b?

Back

m, which is the coefficient of x.

Front

What is the y-intercept in the equation y = mx + b?

Back

b, the value of y when x = 0.

Front

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

Back

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

Front

What is the slope of a line that goes up from left to right?

Back

Positive.

Front

What is the slope of a line that goes down from left to right?

Back

Negative.

Front

What is the slope of a vertical line?

Back

Undefined.

Front

What is the slope of a horizontal line?

Back

Zero.