Which of the following are polynomials and which are not polynomials?
x^2/7+1
-2x^3+2x+4
x^-3+4x
6x-x^3+4x^2

only (2) and (4) are polynomial out of given options.

Step-by-step explanation:

Polynomial  is an expression having  variables having positive integer exponents with real constant coefficients. example

We are given some polynomials and we have to choose whether are polynomial or not.

Consider ,

1)

Since, Polynomial does not have a fractional exponent.

So, 1) Not a polynomial.

2)

Since all of the variables have integer exponents that are positive this is a polynomial.

3)

Not a polynomial because a term has a negative exponent .

4)

Since all of the variables have integer exponents that are positive this is a polynomial.

Thus, only (2) and (4) are polynomial out of given options.

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

happy to

pls mark as brainliest