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**Chapter Review questions (7,8,9,10)**

**a)**

**b)**Yes the graph is linear because it goes in a straight line and it adds the same number each time.

**c)**Yes it is possible to have points in between the other points because you can work an hour and a half and get payed.

**a)**This graph is showing how much cars grade 8's washed and how much they got payed for each one.

**b)**The number of cars (x axis) goes up by 1 and the income (y axis) goes up by 10. The graph is also linear.

**c)**The cost of one car wash costs $10.

**d)**

**e)**10C=I

C= # of cars

I= Income ($)

10C=I

10(15)=I

150=I

**a)**The x axis goes up by 1 and the y axis goes up by 2. The graph is linear and the first point is on the y interval.

**b)**

**c)**

**3x+2=y**

**3(2)=y**

**6+2=y**

**8=y**

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