What is the relation between the variables in the equation x^4/y=7?

a) x^4 varies inversely as y

b) x^4 varies directly as y

c) y varies directly as x^4

d) y varies inversely as x^4

b) x^4 varies directly as y

is the right answer

Step-by-step explanation:

Given that x and y are related by the equation

This can be rewritten as

If x^4 =z is substituted we have

z=7y

i.e. Z directly varies as y and constant of proportionality is 7.

Hence we can write

x^4 varies directly as y

Option b is right

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step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).