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Linear Relationships Exploration

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Linear Relationships Exploration

Choose the best answer where choices are given. For written responses, explain your thinking and include units when needed.

Reading Linear Equations

1.In the equation y = 4x + 7, what are the slope and y-intercept?
  • Slope 7; y-intercept 4
  • Slope 4; y-intercept 7
  • Slope 11; y-intercept 0
  • Slope 1; y-intercept 3
2.A bike rental costs $6 per hour, plus a one-time $8 helmet fee. If x is the number of hours and y is the total cost in dollars, which equation models the cost?
  • y = 8x + 6
  • y = 6x + 8
  • y = 14x
  • y = x + 14
3.A line has a negative slope. Which way does it move as you read the graph from left to right?
  • It rises
  • It falls
  • It stays horizontal
  • It becomes vertical
4.Use y = 3x - 2 to complete the table. Find y for each listed value of x.

x = 0

x = 2

x = 4

Describing and Comparing Relationships

5.Imagine a situation modeled by y = -2x + 12, where x is time in hours and y is a quantity in liters. Describe what the slope and y-intercept mean in this situation.
6.A candle is 18 inches tall and gets 3 inches shorter each hour. Let x represent hours and y represent its height in inches. Write an equation for the candle’s height.
7.Compare y = 5x + 2 and y = 5x - 6. State one feature their graphs share and one feature that differs.
8.A line is represented by y = 3x + 4. If its equation changes to y = 7x + 4, what happens to the graph?
  • The line becomes steeper, and its y-intercept stays the same
  • The line becomes less steep, and its y-intercept stays the same
  • The line shifts up, but its slope stays the same
  • The line shifts down, but its slope stays the same

Apply the Relationship

9.A community pool charges a $12 entry fee plus $4 for each hour of swimming. Let x be the number of hours and y be the total cost in dollars. Complete the table and write an equation.

0 hours

1 hour

2 hours

3 hours

Equation

10.In your own words, explain what changes when the y-intercept in y = 2x + 3 is changed to 8, while the slope remains 2.

3 printable pages

  • Linear Relationships Exploration, page 1 of 3: Reading Linear Equations

    Page 1

  • Linear Relationships Exploration, page 2 of 3: Describing and Comparing Relationships, Apply the Relationship

    Page 2

  • Linear Relationships Exploration, page 3 of 3: 10. In your own words, explain what changes when the y-intercept in y = 2x + 3 is changed…

    Page 3

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