- #1
Jaco Viljoen
- 160
- 9
Homework Statement
Which of the following represent a function:
a)[tex]y=-1/2x+3[/tex]
b)[tex]x^2+y^2=25[/tex]
c)[tex]y=2x^2+7x+3[/tex]
Homework Equations
The Attempt at a Solution
a)
b) is a circle so has 2 values for y and is not a function.
c)
I know that functions only have 1 y relation to x but don't know how to prove whether a and c are functions or not.
Thank you
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