Linear Relations Review

A cross-country ski park contains five different trails. The diagram shows the trails, with each trail being successively larger. Each side length of the shortest trail is 2 km. The side length of each consecutive trail is 0.5 km longer than the previous one. 

• y = 8x
• y = 2x - 5
• y = 2x + 6
• y = 4x

What equation models the graph?

• y = x + 1
• y = x - 1
• y = 0.5x - 2
• y = 0.5x + 2

On top of the $45 monthly fee, Mike’s cell phone plan charges $0.15 for every text message he sends or receives. Write an equation to represent the situation, and if his budget is $80, how many text messages can he send or receive?

• y = 45x + 0.15, 2 texts
• y = 45x + 0.15, 3600 texts
• y = 0.15x + 45, 233 texts
• y = 0.15x + 45, 57 texts

What is the cost for 5 items?

• 5
• 0
• 30
• 25

If Nick works 10 hours, how much money will he earn? (Use this rule)

• $17
• $70
• $80
• $107

The equation for this graph  is ...

• C = 5n
• C = 100n
• C = -5n + 100
• C = 5n + 100

Evaluate the expression.    Let     c = 3     d = 2
3c + 7d

• 27
• 21
• 29
• 23

Which equation best represents the relationship between x and y in the table shown?

• y= 5x+5
• y=1/5x+5
• y=15x+5
• y=10x+5

A dog walker earns $10 each day plus $3 per dog. What equation represents this model?

• y=3x + 10

• y=10x + 3

• y=13x

• y=10x - 3

Which equation matches the table?

• y = x + 5
• y = 5x
• y = x - 5
• x = y - 5