Help please!!
Is the polynomial a difference of squares? Select Difference of squares or Not a difference of squares for each polynomial.

y^4−25
20m^2n^2−121
p^8−q^5
16x^2−81

Difference of squares:

y^4−25

16x^2−81

Not difference of squares:

20m^2n^2−121

p^8−q^5

Step-by-step explanation:

y^4−25

(y²)² - 5²

16x^2−81

(4x)² - 9²

20m^2n^2−121

20 is not a perfect square

p^8−q^5

q⁵ is not a perfect square

y=mx+b

step-by-step explanation:

m slope, b y-intercept

its a straight line parallel to the time axis