graph :
slope (rate of change) = (-2 - (-4) / (-2 - (-6) = 2/4 = 1/2
y int = (0,-1)
x int = (2,0)
f(x) = 2x - 2
slope(rate of change) = 2
y int = (0,-2)
x int = (1,0)
greater rate of change : f(x) = 2x - 2.....greater by 1.5
greater y int : graph....greater by 1
greater x int : graph...greater by 1
steeper graph : f(x) = 2x - 2
