2.5-2.9 Review

Front

What does the equation y = 40x represent in terms of Brandi's luggage?

Back

It represents that the weight (y) of Brandi's luggage is 40 lbs for each bag (x) she carries.

Front

What is the y-intercept in the equation y = -3x + 7?

Back

The y-intercept is 7.

Front

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

Back

The slope is represented by the letter m.

Front

What does the graph of y = x look like?

Back

It is a straight line that passes through the origin with a slope of 1.

Front

If Brandi's luggage weighs 40 lbs per bag, how much does 3 bags weigh?

Back

3 bags weigh 120 lbs (40 lbs x 3).

Front

What is the meaning of the slope in a linear equation?

Back

The slope indicates the rate of change of y with respect to x.

Front

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

Back

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

Front

What is the equation of a line with a slope of -1 and a y-intercept of 5?

Back

The equation is y = -x + 5.

Front

What does it mean if two lines are parallel?

Back

It means they have the same slope but different y-intercepts.

Front

What is the rate of change in the context of a graph?

Back

The rate of change is the slope of the line, showing how much y changes for a change in x.