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

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.

b)Graph the ordered pairs.

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

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.

7x + 3 =y
7(1) + 3 =y
7 + 3 =y
10 =y

7x + 3 =y
7(-4) + 3 =y
-28 + 3 =y
-25 =y

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)

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.)

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.

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