1. Let f(x)= 3x+6 x-2 (a) Find the domain of the function f. (b) Show that 5 is in the range of f, by finding an x such that 3x+6 = 5. x-2 (c) Show that 3 is not in the range of f. 2. Find the slopes of the following lines. Draw the lines (approximately). (a) y 3x+9=0 (b) 10y+12.2x+11=0 (c) y = 50 (d) x = 18 (c) y = 2.8x 3. Explain the following in words. (a) What does the slope of a straight line tell us about the relationship between y and x? (b) What does the sign of the slope indicate about the relationship be- tween y and x on a straight line? (c) What does the absolute value of the slope indicate about the rela- tionship between y and x on a straight line?