Questions: 1. What is common in the four
figures?

2. What makes figures 3 and 4
different from figures 1 and 2

3. Which among the four figure
show perpendicularity?

4. When are lines said to be
perpendicular to each other?​

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation:

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right