The graph below shows the price, y, in dollars, of different amounts of granola, x, in pounds:

a graph titled granola prices shows number of pounds on x axis and price in dollars on y axis. the scale on the x axis shows numbers from 0 to 12 at increments of 2, and the scale on the y axis shows numbers from 0 to 48 at increments of 8. a straight line joins the ordered pairs 0, 0 and 12, 48

which equation best represents the relationship between x and y?

a) y = 8x
b) y = x + 4
c) y = 4x
d) y = x + 8

The answer would be C) y=4x.

Step-by-step explanation:

If you place this equation in place of the ordered pair (12,48) you will get,

4x12=48. So you now know that this is the equation that represents the relationship.

The answer is C. I took the test and got it right. Have a great day

Step-by-step explanation:

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: