You're paid $30 a day plus $75 for each phone that you are simple predict your wages if you assemble 100 phones in one day using the equation of the trend line y = 0.75 x + 30
First, we plug in x=100 into the equation y = 0.75x + 30:
y = 0.75(100) + 30
y = 75 + 30
y = 105
Therefore, if you assemble 100 phones in one day, you would earn $105 from assembling the phones plus your base wage of $30. So, your total wage for assembling 100 phones in one day would be $135.