Which of the graphs shown is given by the equation; y = 2x^3 + 4x + 3?
- a
- b
- c
Explanation from PART66Online
y = 2x^3 + 4x + 3 contains an x cubed term, so its graph is a cubic: the S-shaped curve c. Its gradient, 6x^2 + 4, is always positive, so this particular cubic rises all the way, getting steeper on both sides of the y-axis, which it crosses at y = 3. A linear equation gives a straight line (graph a) and a quadratic gives a U-shaped parabola (graph b).
D
dickson7773 asked · 14 Jun 2014
how does it come to c?
Community Comments (2)
P
PART66Online
15 Jun 2014
Hey.
It is just basic picture. Questions aim is to check your knowledge about equations and graphs. You have to know how many turning points has graph with given equation.
It is just basic picture. Questions aim is to check your knowledge about equations and graphs. You have to know how many turning points has graph with given equation.
P
pickus
7 Dec 2019
C looks like it is cos graph rather than cubic parabola
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