Exploring Rational Expressions: Addition and Subtraction

What is the first step in determining if a table is proportional or non-proportional?

• Check if the sum of y and x is constant.

• Check if the ratio of y over x is constant.

• Check if the x-values are the same.

• Check if the y-values are the same.

How do you find the rate of change (slope) from a table?

• Divide the change in x by the change in y.

• Multiply the change in y by the change in x.

• Subtract the change in y from the change in x.

• Divide the change in y by the change in x.

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

• The value of m when x is zero.

• The value of m when y is zero.

• The value of y when x is zero.

• The value of x when y is zero.

Where does the graph of a non-proportional relationship cross the y-axis?

• At the slope.

• At the y-intercept.

• At the x-intercept.

• At the origin.

How do you calculate the slope from a graph?

• By finding the x-intercept.

• By using rise over run.

• By finding the y-intercept.

• By using the equation y = mx + b.

What is the equation for a non-proportional relationship?

• y = mx

• y = b - mx

• y = b + mx

• y = mx + b

If a graph crosses the y-axis at -4, what is the y-intercept (b value)?

• 1

• 0

• 4

• -4

What does a positive slope indicate about the direction of a line on a graph?

• The line is decreasing.

• The line is increasing.

• The line is vertical.

• The line is horizontal.

If a graph crosses the y-axis at 30 and has a slope of 40/9, what is the equation of the line?

• y = 40/9x + 30

• y = 30x + 40/9

• y = 9/40x + 30

• y = 30x + 9/40

What characteristic makes a graph non-proportional?

• It has a constant y-intercept.

• It has a constant slope.

• It does not go through the origin.

• It goes through the origin.