write an inequality for the given graph

y ≤ -x + 3.

Step-by-step explanation:

It is a solid line so the inequality sign will include an equal sign. Also as it is shade below the line it will include 'less than'.

The slope of the line  is -3/3 = -1  and the y intercept is 3, so the inequality is:

y ≤ -x + 3.

Explanation:

The dot plot indicates we have this data set: {20, 23, 25, 28}

Add up those values to get 20+23+25+28 = 96

Then divide by 4 since there are 4 values being added up here

96/4 = 24

So the arithmetic mean is 24.