Question

Use the horizontal line test to identify the relation whose inverse is not a function. Here are the first two options to choose from. I’ll send the other graphs

Answer 1

The Horizontal Line Test states that; if when drawing a horizontal line to the graph of a function, this line cuts the function at more than one point, the inverse of that function is not a function.

Applying the test for graphs attached:

We can conclude the inverse of graphs number 1, number 2 and number 4, are not functions because the lines cut in mere than one point.