The regression y=-3261+ 2.56x is used to predict the amount of profit made when selling x units of the product. In order to not have a predicted loss, at least how many units must be sold? Pls I need help

Determine the domain and range of the given function. the domain is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}. the range is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}.