To find the x and y intercept of an equation must I first put it in y=mx+b format?
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To find the x and y intercept of an equation must I first put it in y=mx+b format?
you don't have to for all equations; but it helps.
look at this
x-Intercepts and y-Intercepts
also googling your question you'll probably find a quicker solution =]
What the format(this is known as the y-intercept form) allows you to do is get information quickly by plugging in a value for x you get an output for y. Similarly you can write that
, now your inputs for y will give an output for x. Its all just formatting.
As for intercepts, all they are, are points along either your x or y axis. Lets take a look at x intercepts.
An x intercept is when the graph crosses along the x axis. Along the x axis, your value of y is 0 regardless of the value of x! This is why when finding x intercepts you make y a value of "0", this insures that for any value of x, it will be on the x axis.
Similarly for y intercepts, it is any value of y when x is 0, because any point of y when x is 0 will be on the y axis. This is also why when finding your y intercepts, you make y a value of "0".
I hope this made sense! If it doesn't, try drawing any function on a graph that goes through the x and y axis, and write down the coordinates of those points and you'll see it more clearly.
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