Question

Which quadratic rule represents the data in the table?

x –1 0 1 2 3
y -4 -5 -4 -1 4

A. y = –2x^2 + 5
B. y = –x^2 + 5
C. y = x^2 – 5
D. y = x^2 + 5
Please help me i literally been doing this problem for 30 minutes, i think its d but my math doesn't go with it..

Answer 1

The answer that represents the data in the table is C. y = x^2 – 5.

Explanation:

Answer 2

Since there are already choices in the question, I suggest you just substitute in the values of x to each choice and check whether the corresponding value for y appears. This is also called the trial and error method in multiple choice.

The answer that represents the data in the table is C. y = x^2 – 5.