cole088
01.01.2020 •
Mathematics
Invention cost three dollars for a pack of eight. laura gives the cashier $20 to buy inventions and gets $11 and change. how many packs of inventions does laura by?
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Ответ:
20-11=9
(amount given-change=actual cost)
9 ÷ 3 = 3
(actual cost ÷ dollars per pack= number of packs bought)
Ответ:
(3) both a relation and a function
Step-by-step explanation:
Relation : It is the relation established between two set of values
Function : It is a kind of relation, where only output exist for e ach input.
Generally x values presents input values and y values represents the output values.
The given table :
x - y
0 - 8
3 - 2
6 - 1
Here, each x value is related to a y-value , so its a relation.
Also, there only one unique y-value for each x-values, thus its a function.
Hence, the set of ordered pairs in the mapping below can be described as both a relation and a function.