## 9.3 Pg. 357 Questions: 5, 8, 11, 14

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5.) A long-distance telephone plan can be represented as C= 6t, where *C* is the cost in cents and *t* is the time in minutes.

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a)Make a table of values , using at least four whole number values for *t.*

#### b)Graph the ordered pairs.

http://www.funmaths.com/math_tutorials/tutorial_graphs_straight_lines_intercept.htm |

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c) If part minutes are rounded up to the whole next whole minute, is it reasonable to have points between your graph? Explain.

**No because they round it up anyways. So if it's 1 min. 30 secs. It would be rounded up to 1 minute.**

### 8.) Evaluate y= 7x + 3 using each value.

#### a.) x= 1

**7x + 3 =y**

**7(1) + 3 =y**

**7 + 3 =y**

**10 =y**

#### b.) x= -4

**7x + 3 =y**

**7(-4) + 3 =y**

**-28 + 3 =y**

**-25 =y**

#### c.) x= 0

**7x + 3 =y**

**7(0) + 3 =y**

**0 + 3 =y**

**3 =y**

#### d.) y= 17

**7x + 3 =y**

**7x + 3 =y**

**7x + 3 =17**

**7x + 3 =17**

**7x + 14 7x (17-3)**

**2 =x 7x 14 -------> 14 / 7 = 2**

### 11.) The graph below represents part of the linear relation y= -2x.

(Check the online textbook for the graph)

#### a.)Use the equation to calculate the y-coordinate when x=1

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y= -2x

y= -2(-1)

y= 2

b.) What is the value of y in (-4, y )?

**y= -2x**

**y= -2(-4)**

**y= 8**

### 14.) You are given part of the table of values for a linear relation.

(Check online textbook for table of values.)

####
**a.)How could you use a pattern to find the missing y-coordinates?**

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**Well, looking at the table of values, it seems like y is increasing by 2 and x is increasing by 1.**

**b.)Identify the missing y-coordinates.**

Good Job Kathleen! I really like how you have added colour to your post, I can really see that it is neat and very organized! To make your post even better, I suggest you embed a video and add a link! Overall, good job!

ReplyDeleteGood job Kathleen! I like how you made your own pictures, how you highlighted some of the important keys, and how you included a link to your post. Next time, try to include a link to a game.

ReplyDelete