Do I need add ReLU function for regression prediction a positive value?

Hello all, I am developing a model using linear regression to predict the age. I know that the age is from 0 to 100 and it is a possible value. I used conv 1 x 1 in the last layer to predict the real value. Do I need to add a ReLU function after the output of convolution 1x1 to guarantee the predicted value is a positive value? Currently, I did not add ReLU and some predicted value become negative value like -0.02 -0.4…