Question

A function is graphed on a coordinate grid. As the domain values approach infinity, the range values approach infinity. As the domain values negative infinity, the range values approach infinity. To which family of functions might the described functions belong?

A) reciprocal
B) square root
C) exponential
D) quadratic

Answer 1

d. Quadratic :)

i am taking the test so if I'm wrong I'll change my answer

Answer 2

D) Quadratic

Explanation:

A function is graphed on a coordinate grid.

• As the domain values approach infinity, the range values approach infinity.

Domain: If
`x\rightarrow \infty` then

Range:
`y\rightarrow \infty`

• As the domain values negative infinity, the range values approach infinity.

Domain: If
`x\rightarrow -\infty` then

Range:
`y\rightarrow \infty`

We need to choose correct option which follows given domain and range.

Only quadratic function will follow the rule because it has even degree polynomial.

Quadratic function:
`f(x)=ax^2+bx+c`

Degree = 2 and leading coefficient is positive.

Domain:
`x\belong (-\infty,\infty)`

Range:
`y\belong (b,\infty)`

Hence, D is correct option.