Help please. Simple question.
If the line passes through the origin, what is the value of k?
Stacey Warren - Expert brainly.com
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Slope is |dw:1442327944302:dw|
Can you simply solve this by doing |dw:1442328022429:dw|
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does that 0 matter is what im asking
cuz the y intercept is b which is 0
Ypu as it passes throught the origin
In the form ax+by+c=0 c will be 0
ok so can you answer my question
adding 0 does not change the value
(so people don't write it)
the equation is
y = (-7/4)x
you could write y = (-7/4)x +0 but the +0 does not change the equation
so why bother?
to find k you put in x=14 and you get y= -7/4 * 14 = -49/2 = -24.5
but in other cases if it wasn't a 0 would it be necessary?
if you were given the equation
y= (-7/4) x
and were asked what is the y-intercept
you would want to match up your equation with
y= mx + b
we can match -7/4 with m, but there is nothing to match b
we can "fix" that by writing
y= (-7/4) x + 0
(+0 does not change the equation)
and now we can match b with 0
that is an example of why you might write down +0
but usually, we don't bother
if the y intercept is not 0, then you definitely would have to write it down
okay got it im just gonna always include the 0 to be on the safe side.
I would just add it "mentally" (i.e. not write it down)
you also have the same thing with multiplying and "1"
y = x+2
if we match that with y= mx + b
we see b is 2
but what is m?
We write in
y= 1*x + 2
now it is clear that m is 1
but usually we don't write
instead we write y= x+2