Question

Question
The value, y, in USD of a particular stock for 4 days, x, is shown in the table.

USD of Particular Stakes
days 0 1 2 3 4
stock value ($)
19.2 6.3 2 6.3 19.2
What type of function could be used to model the value, y, of the stock as a function of time, x?

(1 point)
Responses

exponential growth function
exponential growth function

exponential decay function
exponential decay function

linear function
linear function

quadratic function
quadratic function

Answer 1

Quadratic function.

Reason: The values are symmetric about x = 2 with a minimum y = 2 at x = 2, which fits a parabola (e.g. y = 4.3(x − 2)^2 + 2 gives the listed values).