Equations for Proportional Relationships

What is the equation of the line?

• y = 20x
• y = x + 20
• y = 2x
• y = x + 2

What equation is represented by the graph?

• y = x + 2

• y = 2x

• x = 2y

• y = x + (-2)

What is the correct equation for the graph?

• y = x + 5

• x = y

• y = 5x

• x = 5y

Write an equation from the graph using (p) for price and (w) for weight.

• p = 20w
• w = 20p
• p = 20p
• w = 20w

Is the picture showing an additive or a multiplicative relationship?

• Additive
• Multiplicative

Is the given table a proportional relationship? If so, what is the constant of proportionality?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

Identify the constant of proportionality.

• k = 2

• k = 3

• k = 1.50

• k = 2/3

• none (not proportional)

What is the constant of proportionality? 

• 45 mph
• 90 mph
• 135 mph
• 2 mph

What is the constant of proportionality?

• 2 swings / 1 day

• 0.5 swings / 1 day

• 4 swings / 1 day

• None of the above

Find the constant proportionality of 624 calories in 3 servings.

• 1,872 calories per serving
• 208 calories per serving
• 624 calories per serving
• 621 calories per serving