Alinear function, f, has an x-intercept at (5,0) and a y-intercept at (0,3). which best describes the shape of the graph of this function? a. as x approaches positive infinity, f(x) approaches positive infinity. b. as x approaches positive infinity, f(x) approaches 3. c. as x approaches positive infinity, f(x) approaches 5. d. as x approaches positive infinity, f(x) approaches negative infinity.