Question
Tell wether the relation is a function (4,5), (-3,2), (4,9), (-2,-3)
Answers
Blake
No. the points (4,5) and (4,9) have two different y-values for the given x-value (4). this fails the vertical line test.
bobpursley
at x=4, doesn't y have more than one value? Is that allowed in a function?
Ashley
blake i understand what u are saying i just don't understand ur explanation
Blake
try drawing a graph. in the definition of a function, an x value can only have one y value. since the x value of four has two y values (5 and 9), it can't be a function.
try going to wikipedia and searching for "function mathematics" if you're still having trouble. it has the definition and explains it with examples.
try going to wikipedia and searching for "function mathematics" if you're still having trouble. it has the definition and explains it with examples.