The graph shows the girth of the trunk of a fir tree after different numbers of years: line joining ordered pairs 0, 5 and 1,12 and 2, 19 and 3, 26 and 4, 33 and 5, 40 what does the y-intercept of the graph represent? a)the girth increases by 7 centimeters each year. b) the girth increases by 5 centimeters each year. c) the original girth was 5 centimeters. d) the original girth was 7 centimeters.

C) The original girth was 5 centimeters.

Step-by-step explanation:

The y intercept is where it crosses the y axis ( 0,5) and is the initial starting point  of the girth

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.