slope is change in y over change in x
use 2 points from the table so -3,-21 and -6,-39
change in Y: -39 - -21 = -18
change in x = -6 - -3 = -3
slope = -18/-3 = 6
slope = 6
The area of the trapezoid is 4.5cm
Answer:
1. Slope-intercept form: 
Standard form: 
2. Slope-intercept form: 
Standard form: 
3. Slope-intercept form: 
Standard form: 
Step-by-step explanation:
Slope intercept form: 
where:
= y-coordinate
= slope
= x-coordinate
= y-intercept
Standard form: 



Slope-intercept form: 
Standard form: 


Slope-intercept form: 
Standard form: 



Slope-intercept form: 
Standard form: 
To have a different rectangle with the same perimeter you just have different measurements. If you need an example let me know!