O GRAPHS AND FUNCTIONS vertical line test Function Yes O No

O GRAPHS AND FUNCTIONS vertical line test Function? | Yes O No n Yes No No Explanation

Solution

to check if graph is a function it should pass vertical line test

draw vertical lines cutting the graph at different values of x

if the line cuts the graph at one point then its a function . if it cuts the graph at more than one point its not a function

for graph 1 , vertical line will cut the graph at more than 1 point , hence its not a function

for graph 2 , vertical line will cut the graph at more than 1 point , hence its not a function

for graph 3 , vertical line will cut the graph at 1 point , hence its a function

for graph 4 , if we draw vertical line through the points , no 2 points will pass through the same line

hence its a function

for graph 5 : if draw a line at x = -5 it will cut the 2 points

hence not a function