To calculate your wages, we can plug in the number of phones assembled (100) into the equation of the trend line:
\[ y = 0.75x + 30 \]
Substituting \( x = 100 \):
\[ y = 0.75(100) + 30 \]
Calculating that gives:
\[ y = 75 + 30 \] \[ y = 105 \]
So, your wages if you assemble 100 phones in one day are $105.00.