Which relation is a function?

Bottom left graph

Step-by-step explanation:

Given are four graphs and we have to find out which is a function.

Any mapping from ordered pair x to y is a relation.

All relations need not be functions

A relation is a function only if the graph satisfies the vertical line test.

i.e. if we draw any vertical line in any point of the domain the line should cut the curve only at one point.  Even if this is violated for one point, the relation is not a function

In the graph given, I one on top left has so many points on the vertical line. Hence not a function.  II is a parabola open right and vertical line cuts atleast in two points one above and one below the x axis and not a funciton.

Bottom right most is a circle and any vertical line has two points of intersection above and below the x axis.

Bottom left is a graph since any vertical line cuts at only one point.

Answer is bottom left graph

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.

step-by-step explanation: