Lesson 6

Representations of Linear Relationships

Problem 1

Create a graph that shows three linear relationships with different y-intercepts using the following slopes, and write an equation for each line.

Slopes:

  • \frac15
  • \frac35
  • \frac65
Graph of quadrant 1.

Solution

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Problem 2

The graph shows the height in inches, h, of a bamboo plant t months after it has been planted.

Graph, t, months, h, inches.
  1. Write an equation that describes the relationship between h and t.
  2. After how many months will the bamboo plant be 66 inches tall? Explain or show your reasoning.

Solution

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Problem 3

Here are recipes for two different banana cakes. Information for the first recipe is shown in the table. 

sugar (cups) flour (cups)
\frac12 \frac34
2\frac12 3\frac34
3 4\frac12

The relationship between cups of flour y and cups of sugar x in the second recipe is y=\frac74x

  1. If you used 4 cups of sugar, how much flour does each recipe need?
  2. What is the constant of proportionality for each situation and what does it mean?

Solution

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(From Unit 5, Lesson 3.)

Problem 4

Show that the two figures are similar by identifying a sequence of translations, rotations, reflections, and dilations that takes the larger figure to the smaller one.

figure ABCD and figure EFGH on a grid.

Solution

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(From Unit 2, Lesson 11.)