Can someone please let me know if this represents a function !

This graph does not represent a function.

Step-by-step explanation:

A function is defined as a set of values that have one output (y-value) for each input (x-value).  In other words, each x-value should only ever correspond with a single y-value.  In this graph, there are multiple y-values for the x-values between ~-2 and ~12.  Another piece of evidence that this is not a function is that there are many inputs that have no output.  This makes this graph a relation rather than a function.

d. 9

step-by-step explanation:

54/12 = 4.5

sf = 4.5

so x = 2 · 4.5 = 9

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%