Question

How do you use the important points to sketch the graph of `y = x^2 + 1`?

Answer 1

Assign values to x (maybe 4 or 5 will be sufficient)

Explanation:

If x is 0, your function `y=1`
If x is 1, your function `y=2`. Similarly if x is -1, `y=2`
If x is 2, your function `y=5`. Similarly if x is -2, `y=5`

The graph is given below. graph{(x^2)+1 [-9.29, 10.71, -1.2, 8.8]}