Question

how can I find the y intercept if I can't read it directly from the graph because its an improper fraction and/out of view on my limited view of the graph? Two points on exact grid lines: (6, 5) (2, 0)

Answer 1

Find the slope m first:
m = (5 − 0) / (6 − 2) = 5/4.

Use y = mx + b and one point (e.g. (2,0)) to solve for b:
0 = (5/4)*2 + b → 0 = 5/2 + b → b = −5/2.

So the y-intercept is −5/2 (i.e. the point (0, −2.5)).