Is the following relation a function?
{(4, 5), (5, 6), (4,3), (7, 8)}

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

What is the equation of a line passing through (-6,5) and having a slope of 1/3