What the domain and range?

The domain is {x : -7 ≤ x ≤ 6} ⇒ [-7, 6]

The range is {y: -5 ≤ y ≤ 4} ⇒ [-5, 4]

Step-by-step explanation:

The domain is all values of x belong to the graph

The range is the values of y that corresponding to the domain

Let us study the graph to find the domain and the range

∵ The graph starts from the point (-7, 4) ⇒ the highest point

∵ The graph ends at the point (6, -5) ⇒ the lowest point

→ That means the most left point has x-coordinate -7 and the most

   right point has x-coordinate 6

∴ The domain is {x : -7 ≤ x ≤ 6} ⇒ [-7, 6]

∵ The highest point on the graph has y-coordinate 4

∵ The lowest point on the graph has a y-coordinate -5

→ The range is the values of y from these values

∴ The range is {y: -5 ≤ y ≤ 4} ⇒ [-5, 4]

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.