To determine which points would appear on the linear function \( C = 1.25m + 25 \), we'll compute the total cost \( C \) for various values of \( m \):
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For \( m = 2 \): \[ C = 1.25(2) + 25 = 2.5 + 25 = 27.5 \] So, the point is \( (2, 27.5) \).
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For \( m = 4 \): \[ C = 1.25(4) + 25 = 5 + 25 = 30 \] So, the point is \( (4, 30) \).
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For \( m = 30 \): \[ C = 1.25(30) + 25 = 37.5 + 25 = 62.5 \] So, the point is \( (30, 62.5) \).
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For \( m = 35 \): \[ C = 1.25(35) + 25 = 43.75 + 25 = 68.75 \] So, the point is \( (35, 68.75) \).
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For \( m = 8 \): \[ C = 1.25(8) + 25 = 10 + 25 = 35 \] So, the point is \( (8, 35) \).
Now let's match up the calculated points with the options provided:
- \( (2, 2.5) \) and \( (4, 5) \) — Not on the function
- \( (30, 4) \) and \( (35, 8) \) — Not on the function
- \( (2, 22.5) \) and \( (4, 20) \) — Not on the function
- \( (4, 30) \) and \( (8, 35) \) — Both points are on the function (we found \( (4, 30) \) and \( (8, 35) \)).
Thus, the correct response is:
(4,30) and (8,35).