700 copies would cost $121
Explanation:Given that 125 copies cost $29.00, and 175 copies cost $37.00.
Since the cost is a linear function, we use the formula:
[tex]\begin{gathered} y=y_1+(\frac{y_2-y_1}{x_2-x_1})(x-x_{1)} \\ \\ x_1=125 \\ y_1=29 \\ x_2=175 \\ y_2=37 \\ x=700 \end{gathered}[/tex]So,
[tex]\begin{gathered} y=29_{}+(\frac{37_{}-29_{}}{175_{}-125_{}})(700-125)_{} \\ \\ =29+0.16(575) \\ =121 \end{gathered}[/tex]700 copies would cost $121
