Jaime

Mathematics

25 April, 02:01

Question 1 Determine whether a relation is a function, as well as its domain and range:

a. Which of the following relations are functions?

1. y = - x+3

2. x=y+3

3. x-y=3

A. None of them

B. All of them

C. Choice 2 only

D. Choice 3 only

b. Find the range for f (x) = x^2+1, for x>0.

A. y>1

B. y≥1

C. y<1

D. y≤1

^& not sure on this, but it's A or B?

c. Find the domain for f (x) = (x-3) / (x-2)

A. x≠ - 3

B. x ≠ 2

C. x ≠ - 3, - 2

D. x ≠ - 2

^this one is B, right? that's what I got.

d. Find the range of the function: f (x) = x+2, for x≠1.

A. All real numbers

B. y≠1

C. y≠2

D. y≠3

^this one is D, right? I got this too.