Mathematics for IGCSE & O level - Sketching Curves (Section 3 - No. 42)
Which of the following equations describes a graph that does not cross the x-axis?
y = x + 1
y = x^2 + 1
y = x^2 - 1
y = x^3 - 1
Explanation
y = x^2 + 1 has no real roots, and thus, does not cross the x-axis.
Comments (0)
