Question

right now in class im learning domain and range, does anyone have any tips or pointers?

Answer 1

Here are a few things to remember:

Arrows - represents a never ending line (represented by infinity or negative infinity)
Open points - represents end of a line but DOES NOT include the number in which the point is on (x or y)
Closed point - represents the end of a line and includes that points x and y values

Answer 2

Example for arrows:
"A point at (-2,5) with a continuous line into QII"
Domain: \(-2 \lt x \lt (infinity))\)
Range: \((5 \lt x \lt infinity)\)

Example for open points:
"An open point at (-2,5) with a point at (3,8)"
Domain: \((-1 \lt x \lt 3)\) (notice -1 and not -2)
Range: \((5 \lt x \lt 8)\)

Example for closed points:
"A point at (-2,5) to a point at (3,8)"
Domain: \((-2 \lt x \lt 3)\)
Range: \((5 \lt x \lt 8\)