A closed circle means that value is included, and an open circle means that value is excluded.
Example:
x > 2 ---- Graphed with an open circle, everything greater than but not including 2
x ≤ 3 ------ Graphed with a closed circle, everything less than and including 3
3,059 I don’t really care
Y=-4x+3 is already in slope intercept form. Graphed it looks like this
4/5, or 80%, of the flowers are not tulips.