Answer:
y = 3/4x - 2 2/3
Step-by-step explanation:
Are there choices?
y = 3/4x + b
1/3 = 3/4(4) + b
1/3 = 3 + b, b = -2 2/3
y = 3/4x - 2 2/3
Positive exponent? An index would imply that the base, x, had a fractional exponent.
My Dear Aunt Sally used to say, "If there's a negative exponent in your face, then flip your base!"
In other words, if the exponent is negative, take the reciprocal of the base, x →

and change the exponent to positive.
Therefore:

I have cross the fraction bar line change the exponent sign.
1=2x^2-7
2x^2=8
x^2=4
so x=2 or x=-2
One of them is 3,8,3,8 and the other is 4,6,4,6