Let A = {a, b, c} and B = {5, 7, 9}. State, which of the given are relations from B to A.
{ (5, 7), (9, 9), (7, 5) }

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Solution

For a set of ordered pairs to be a relation from B to A, then the x-coordinates of the ordered pairs should be from B and the y-coordinates should be from A.
Now, in the given set of ordered pairs, the y-coordinates are not from the set A. Hence, the given set of ordered pairs is not a relation from B to A.

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Similar questions

Let A = {a, b, c} and B = {5, 7, 9}. State, which of the given are relations from B to A.

{ (5, a), (5, b), (5, c) }

State, true or false :
$(i) \frac{7}{9} = \frac{7 + 5}{9 + 5} (i i) \frac{7}{9} = \frac{7 - 5}{9 - 5} (i i i) \frac{7}{9} = \frac{7 \times 5}{9 \times 5} (i v) \frac{7}{9} = \frac{7 \div 5}{9 \div 5} (v) \frac{- 5}{- 12} is a negative rational number (v i) \frac{- 13}{25} is smaller than \frac{- 25}{13} .$

Q. Factorize:
(5a − 7b)³ + (9c − 5a)³ + (7b − 9c)³

Q. In a shoe mart different sizes (in inches) of shoes sold in a week are;

7, 9, 10, 8, 7, 9, 7, 9, 6, 3, 5, 5, 7, 10, 7, 8, 7, 9, 6, 7, 7, 7, 10, 5, 4, 3, 5, 7, 8, 7, 9, 7

. Which size of the shoes must be kept more in number for next week to sell? Give the reasons

A = {a, b, c}

and

B = {5, 7, 9}

. The relation from

B

A

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Let A = {a, b, c} and B = {5, 7, 9}. State, which of the given are relations from B to A. { (5, 7), (9, 9), (7, 5) }

Let A = {a, b, c} and B = {5, 7, 9}. State, which of the given are relations from B to A.
{ (5, 7), (9, 9), (7, 5) }