Is the following a relation a function?

X Y

1 - 2

1 - 3

2 1

3 - 2

Yes or no

If a and b are both positive, two-digit integers, is a + b a multiple of 11? The tens digit of a is equal to the units digit of b, and the tens digit of b is equal to the units digit of a Both a and b are odd.

89,659 to the nearest thousand

Sophia spent 6; 247 rand on her trip. She exchanged the rand she had left for U. S dollars. The exchange rate was one rand to $0.14. How many U. S dollars did sophia get

Which of the following is the minimum value of the equation y = 2x2 + 5?

What does martin luther king jr mean when he said "Freedom at last"

When this polynomial is simplified, what is the coefficient of x: 10x^2+8x-6x^3+4x^2+12x^3-x+20 ... ?

A club is making posters to raise money. the printer charges a base fee of $270 and $2 per poster for supplies. a person sells each poster for $5. how many posters must he sell to make profit of $300?

Write ratio in simplest form 6:3/5

The section has a height of 7.5 cm. If the area of the section of glass is 17.25 cm2, how long is the base of the section?

A team won 7 of it's 12 games. What fraction of its game did the team win?