What is the y-intercept and/or slope of these 3 points: (1, 4.5) (2,4) (3, 3.5)
+129850 The slope is constant between the three points......y changes by -1/2 and x changes by 1 so the slope is : change in y / change in x = (-1/2) / 1 = -1/2
And using (1, 4.5) and subtracting 1 from the x coordinate and adding 1/2 to the y coordinate we get:
(0, 5).......so the y intercept = 5
