Luyện bài tập SAT ONLINE Cấp Tốc | Chinh phục 1500+ trong 30 ngày

The function f(x) equals 10% of x, which can be written as f(x)=0.1x for x>0.

This function has a constant rate of change (slope) of 0.1, which is positive. A function with a positive constant rate of change is classified as an increasing linear function.

To illustrate, as x increases, the function value f(x) also increases (though at a slower rate than x itself). For example, if x increases from 10 to 20, then f(x) increases from 1 to 2.

Therefore, the correct answer is D) Increasing linear.