Help me solve this question please

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

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

What is the rate of change of a line that passes through (2,-5) and (6,-2)?