Question

For the equations y=3.5x and y=25x + 40.50, x represents time in hours and y represents cost in dollars . Which equation is not the equation of proportional relationship? Explain.

Answer 1

y=25x+40.50 is not the equation of proportional relationship because if you were to graph the equation, the line would not go through the origin of the graph. You can tell beause of the y-intercept that is given in the equation, 40.50.

Explanation:

Answer 2

`y=25x+40.50`

Explanation:

We have been given two equations. We are asked to choose the equation, which is not proportional.

We know that two proportional quantities are in form
`y=kx`, where k is constant of proportionality.

We can see that the equation
`y=3.5x` is a proportional equation, where constant of proportionality is 3.5.

We can see that the equation
`y=25x+40.50` is not a proportional equation as it has a constant.

Therefore, the equation
`y=25x+40.50` is not a proportional.