Use the two red points to write the equation in slope-intercept form. write any coefficients as integers, proper fractions, or improper fractions in simplest form.
point 1: (0,7), point 2: (7,4)

find the slope between the two points 7-4/0-7

slope=-3/7

put into pointslope form: y-7=(-3/7)(x-0

simplify y-7=-3/7x

add 7

y=-3/7x+7

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:

she will travel a distance in the range of 3 - 11 miles