Amuseum has a 1/2 ounce piece of a precious metal. when the museum first received the piece, it had a value of $90. its value has since decreased by 20%. what is the current value per ounce of the piece of metal?
a: $72.00
b: $144.00
c: $36.00
d: $180.00

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.