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Make sure that the line passes through -13 when it hits the y axis also make sure the line is going upwards, it is hard to explain, can you post the other questions?
For this case we have the following function:
 y = -13 + 3x
 We note that the cut point with the y axis is:
 (0, -13)
 The slope is given by:
 m = 3
 The slope is greater than zero, therefore the graph grows as the values of x increase.
 Answer:
 
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