To find the value of the function \( y = 18x - 13 \) when \( x = -4 \), we can substitute \(-4\) for \(x\):
\[ y = 18(-4) - 13 \]
Calculating this step by step:
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Multiply \(18\) by \(-4\): \[ 18 \times -4 = -72 \]
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Then, subtract \(13\): \[ -72 - 13 = -85 \]
Therefore, the value of the function when \( x = -4 \) is \( -85 \).
However, I realize that none of the answer options provided correspond to \( -85 \). Let's recheck the options and calculations briefly:
- The expression \( y = 18(-4) - 13 \) simplifies as shown.
- The calculations were accurate.
It seems there is a mismatch between the calculations and the options provided. Please confirm if the function and the value for \( x \) are correct. If they are, \( -85 \) is the calculated answer. If the options are meant to represent different inputs, kindly clarify.