Equation of Proportional Relationships

What is the formula for a proportional relationship?

• y=kx

• y=k/x

• z=ykx

• y=ky

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

What does k represent in the equation y = kx?

• constant rate of change

• constant of proportionality

• the equation

• x/y

What is the equation?

Let d = dogs, and p = paws

• p = 4d

• p = (1/4)d

• p = 2d + 8

• d = 4p

Which equations represents the relationship between pounds of food (y) and bags of dog food (x)?

• y=10x

• y=3x

• y=3x+1

• y=x+3

The graph shows the relationship of the amount of time (in seconds) to the distance (in feet) run by a jaguar.<\/p>

Is the distance run by the Jaguar proportional to the time? Why or why not?<\/p>

• Yes because the graph creates a straight line that passes through the origin.<\/p>

• No because the graph does not create a straight line.<\/p>

• No because the graph does not pass through the origin.<\/p>

• y = x + 4
• 5x = y
• y = x + 5
• x/5 = y

A graph needs to be a straight line and goes through _____ to be proportional.

• The origin

• The y-intercept

• The y-axis

• The x-axis

A graph needs to go through _____ to be proportional.

• The origin

• The y-intercept

• The y-axis

• The x-axis

The total number of washcloths, y, contained in, x, packages. If there were 8 packages, which of the following equations best represents this graph?

• y = 8 + x

• y = 8 - x

• y = 8x

• y = 8/x