the table shows the number of parts, y, a machine produces each hour, x. write an equation for this situation, and indicate if this is proportional or nonproportional.
y(number of parts): 0, 125, 250, 375, 500
x(number of hours): 0, 1, 2, 3, 4
a y = 125x, nonproportional
b y = 125x + 1, nonproportional
c y = 125x, proportional
d y = x + 125, nonproportional
The correct answer is c) y = 125x, proportional.
This is a proportional relationship because the number of parts produced is directly proportional to the number of hours the machine runs. Each hour the machine produces 125 parts, which makes it proportional.