Proportional & Non-Proportional Practice (MATH WITH MORRIS)

• Proportional, because the line passes through the origin and has a constant rate of change.

• Proportional, because the line has a negative slope.

• Non-proportional, because the line is curved and does not represent a constant rate.

• Non-proportional, because the line does not pass through the origin.

• Proportional, because y increases by 12 each time.

• Non-proportional, because the first pair does not include zero.

• Non-proportional, because the table has only three rows.

• Proportional, because the line is straight and passes through the origin.

• Proportional, because the slope is constant and negative.

• Non-proportional, because the line does not pass through the origin.

• Non-proportional, because the graph has points with positive x-values.

• Proportional, because it is in the form y = kx with k constant.

• Proportional, because the y-intercept is 3/5.

• Non-proportional, because the slope is a fraction.

• Non-proportional, because x is multiplied by 3 then divided by 5.

• Proportional, because the cost per pizza is constant.

• Proportional, because the fee is small compared to the cost.

• Non-proportional, because there is a fixed fee (y-intercept) in addition to the per-pizza rate.

• Non-proportional, because the number of pizzas can vary.

• Proportional, because the slope is −1.

• Proportional, because it is linear.

• Non-proportional, because the equation is in the form y=mx + b.

• Non-proportional, because x is negative.

• Proportional, because both x and y increase.

• Non-proportional, because the pairs are not whole numbers.

• Proportional, because the curve passes through the origin.

• Proportional, because the y-values increase.

• Non-proportional, because the graph is not a straight line.

• Non-proportional, because the slope is positive.

• Proportional, because the rate per guest is constant.

• Proportional, because the base fee is part of the cost.

• Non-proportional, because of the base fee, which creates a nonzero y-intercept.

• Non-proportional, because guests pay individually.

• Proportional, because it is of the form y = kx with k = 7.5.

• Proportional, because the graph would be curved.

• Non-proportional, because 7.5 is not an integer.

• Non-proportional, because the equation lacks a y-intercept term.