## 9.3 Chapter Review, Questions: 7 and 8

The graph shows his rate of pay.

a) Make a table of

values from the graph

b) Does the graph represent a linear relation? Explain.

c) Is it possible to have

other points between

the ones on this graph?

Explain.

**Answers**

a)

b) Yes, because the ordered pairs are in a straight line, and also because the y axis has the same repeating pattern the goes up by 9 and so does x but x goes up by 1's

c) Yes, because time (h) has minutes and pay ($) has cents,

so when you put points in between it will still be okay.

**8. The graph shows a linear relation.**

a) Describe what the graph is about.

b) Describe patterns on the graph.

c) What is the cost of 1 car wash?

d) Make a table of values from the graph.

e) If 15 cars are washed what is the income for the grade 8 class

**Answers**

a) The graph is about a Grade 8 car wash and how many income they will get per car.

b) The x axis goes up by 1. The y axis goes up by 10. It is a linear relation. Over 1, up 10

c) The cost of 1 car wash is $10.

d)

e) The income would be $150 because 10x = y

## 9.3 Chapter Test, Questions: 9 and 10

**9. The pattern can be represented by the formula**

*b*= 4*f*where*b*is the number of black dots and*f*is the figure number.a) Make a table of values for the number of black dots in figures 1 to 5

b) Use the formula to determine the number of black dots in figure 60.

**Answers**

a)

b) 4

*f*=

*b*Formula

60f =

*b*Fig. 60 = ? black dots

60(4) =

*b*60x4 = ? black dots

240 240 black dots

**10. The formula for the pattern below is**

*s*= 2*f*+ 1, where*s*is the number of small square and*f*is the figure numbera) Make a table of values for the first five figures in the pattern.

b) Draw a graph to show a relationship.

c) Is the relationship linear? Explain.

**Answers**

a)

b)

c) Yes because the ordered pairs are in a straight line and because the x and the y axis are going at a consecutive value of numbers, x axis is going up by 1's and the y axis going up by 2's, even though it starts at 3 it's still okay as long as pattern is the same.

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