Is the graph increasing or decreasing​

Depends on how the X and Y values are oriented but if the X value is on the bottom and the Y is on the top, then the graph is decreasing

Step-by-step explanation:

Have a great day!

decreasing

Step-by-step explanation:

Estimate the sum in two different ways:

A) By rounding off to the highest place value (hundreds):

 368 = 400  (3 hundreds is the highest place value)

 231 = 200 (2 hundreds is the highest place value)

 400 + 200 = 600

B) By rounding off to the second highest place value (tens):

   368 = 370

   231 = 230

   370 + 230 = 600

Hope this helps!