Which shows a function that is decreasing over its entire graph?

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

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Is there a picture of a graph or whatever that goes along with this?

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28