To determine the correct system of equations representing the costs of the two gyms, let's analyze the information provided in the problem regarding the two lines:
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First Line (Fit Fast): This gym has a cost that can be modeled by the line that passes through the points (0, 10) and (4, 32):
- At (0, 10): This suggests that there is a starting cost of $10 when no classes are taken.
- To find the slope, we use the points (0, 10) and (4, 32): \[ \text{slope} = \frac{32 - 10}{4 - 0} = \frac{22}{4} = 5.5 \]
- The equation for this line is: \[ y = 5.5x + 10 \]
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Second Line (Stepping Up): This gym seems to charge a monthly fee plus an additional fee per class, and it passes through (0, 0) and (2, 15):
- At (0, 0): This suggests there is no base cost when no classes are taken.
- To find the slope, we use the points (0, 0) and (2, 15): \[ \text{slope} = \frac{15 - 0}{2 - 0} = \frac{15}{2} = 7.5 \]
- The equation for this line is: \[ y = 7.5x \]
Thus, the system of equations that represents the costs of the two gyms is:
- \( y = 5.5x + 10 \) (Fit Fast)
- \( y = 7.5x \) (Stepping Up)
Therefore, the best choice from your options is:
- \( y = 5.5x + 10 \) and \( y = 7.5x \)