Ciara has a bowl of cereal for breakfast. the amount of cereal in the box (y) is determined by the number of days (x) that have passed since she purchased the cereal. the graph below shows that this relationship is a linear function

A figure is located at A(0, 0), B(−3, −4), and C(−3, 0) on a coordinate plane.

This form a right triangle ( because vector AC(3, 0) is perpendicular with vector BC(0, 4) at C. You can check it by take multiplication of vector AC and BC, you would get: vector AC x vector BC = 3 x 0 + 0 x 4 = 0)

And as you know a cone is created by rotating a right triangle around its side (not hypotenuse). Here, the right triangle ABC has AB as hypotenuse and AB is not lying on rotating axis (x axis).

=> The 3D-shape, which is created by rotating ABC around x-axis would be a cone.

Hope this helps!

:)