Determine whether the formula describes y as a function of x. Explain your reasoning.
y = -x

Question

Determine whether the formula describes y as a function of x. Explain your reasoning.
y = -x

anonymous · Answer

Tell us what you think @lornbeach

zzr0ck3r · Answer

do you know what the vertical line test is?

anonymous · Answer

nope

anonymous · Answer

well this graph would be a normal diagonal line through the origin but reversed

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The vertical line test basically means if you put a vertical lien through the  graphed line does it hit the graphed one in more then one spot...lets try it

|dw:1374693429900:dw|

as you see it wont so...the formula in fact describes y as a function of x

radar · Answer

y = mx + b

y= -1x + 0

Looks like a line with a slope of -1 and intercept at 0......Yes it is a function.

radar · Answer

Reasoning is that for any value of x, there is only one y value.

radar · Answer

I think I need to reword that, for a value of x, there is only one value of y.

radar · Answer

When graphed as hilterboy has show a vertical line will intersect at only one point.