SOLUTION: Could someone explain to me how you know aif a graph is a function. here are three points to work with. (-4,9) (2,2) (8,8)

Question 132890: Could someone explain to me how you know aif a graph is a function.
here are three points to work with.
(-4,9) (2,2) (8,8)
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
One simple way to know if a graph is a function is to use the "vertical line test'. If there is any vertical line that intersects the graph in more than one point, it is NOT a function.
You are just given 3 points. In this case, what you need to show is "for any given value of x, there is one and only one value for y". That is certainly the case for the three points you show.
RELATED QUESTIONS
Could someone explain to me how you know aif a graph is a function. here are three... (answered by jim_thompson5910)

Could you explain how to solve this problem? It is supposed to plot 2 points on a... (answered by josgarithmetic)

Can someone help me with this problem? I'm stuck!!! I'm in a class that is over my head. (answered by Earlsdon)

Could someone help me with these; 1) Could someone show me how to graph x^2/16-y^2/25=1 (answered by Alan3354)

can someone please show me how to do these fractions? They are just plain adding or... (answered by Mathtut)

For the function y = x2 - 6x + 8, perform the following tasks: a) Put the function in (answered by funmath,venugopalramana)

-1/4(x-8)+1/2(x+2)=x+9 Could someone help to explain how to solve this? I seem to... (answered by scott8148,rfer)

Draw a picture of each of the functions below, and explain whether or not each is a... (answered by MathLover1)