The function f(x)=3x–12 has the domain x∈[–20,10). What is the range of this function?
The function is a straight line graph, with uniformity of varience in the x- and y-values.
At x = -20, y = f(-20) = 3*(-20) - 12 = -60 - 12 = -72
At x = 10, y = f(10) = 3*(10) - 12 = 20 - 12 = 18
The range of thte function is: [-72, 18)