1. ## multiple chose question

x 0 2 4 5 6 8 10
y 0 256 384 400 384 256 0

Which statement explains what type of function is represented in the table?

A It is linear because the x values increase by a constant amount?

B It is quadratic because the function has two x intercepts?

C It is exponential because the y values do not increase by a constant amount?

D It's absolute value because the y values increase and then decrease?

I think it's D am i right?

2. Originally Posted by gumi
x 0 2 4 5 6 8 10
y 0 256 384 400 384 256 0

Which statement explains what type of function is represented in the table?

A It is linear because the x values increase by a constant amount?

B It is quadratic because the function has two x intercepts?

C It is exponential because the y values do not increase by a constant amount?

D It's absolute value because the y values increase and then decrease?

I think it's D am i right?

Sorry, it's B

3. It's b) because looking at the value of y, you see it reaches a maximum when $y=400$. That is in $(5,400)$. As the function then decreases at the same rate as it increased, it means that the point $(5,400)$ is a vertex of a parabola. Also it intersects the x axis in two points : $0$ and $10$. It's not d) because it increases and decreases not at a constant rate.

4. Originally Posted by arbolis
It's b) because looking at the value of y, you see it reaches a maximum when $y=400$. That is in $(5,400)$. As the function then decreases at the same rate as it increased, it means that the point $(5,400)$ is a vertex of a parabola. Also it intersects the x axis in two points : $0$ and $10$. It's not d) because it increases and decreases not at a constant rate.

Equation: $y=-16x^2+160x$