This part two of the homework I posted earlier, I need with this as well

Which of the following is true for the relation f(x)=2x^2+1

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Graph the linear function using the slooe and y intercept