Yes, irrational number are all numbers that are not rational and all integers are rational numbers
Answer:
f(x) = -1.18056x² +9.55556x -12.4604
Step-by-step explanation:
As required by the problem statement, technology was used to find the polynomial function that passes through the given points. The coefficients shown above are rounded to 6 significant figures. The exact coefficients appear to be ...
f(x) = (-1 13/72)x² +(9 5/9)x -(12 221/480)
f(x)=-3x^2-1
f(-2)= -3(-2)²-1=-3·4-1= - 13
Please see pic for answer and work