SOLUTION: 6. Tayler claims that when a linear equation is written in general form, Ax + By + C = 0, the intercept of the corresponding graph is always . /1 a. Show that Tayler’s claim

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Question 1018655: 6. Tayler claims that when a linear equation is written in general form, Ax + By + C = 0, the intercept of the corresponding graph is always .
/1 a. Show that Tayler’s claim is true for the equation 3x + 5y + 45 = 0.
Answer:
/1 b. Explain why represents the x-intercept. (Hint: What y-value can be substituted into
Ax + By + C = 0 to determine the x-intercept?)
Answer:
/1 c. Tayler’s claim is not true for horizontal lines. Explain why.
Answer:
/1 d. Suggest a similar rule for the y-intercept. Check the rule using 3x + 5y + 45 = 0.
Answer:
/1 e. Will the rule always work?

Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
...always what?

Try taking the most generalized form you have, and find the x and y intercepts.



let y=0





let x=0


The x intercept will be
and
the y intercept will be .

Watch the signs carefully when you apply this.

What if Horizontal Line?
Slope is 0.



(Do not confuse the differently cased variables)
but the slope being 0 requires that A=0, and finding y-intercept would give - BUT DIVISION BY ZERO IS IMPOSSIBLE, so this method of finding the x-intercept will not give any result; in any case, as long as the horizontal line is any value other than 0, non-intersecting the x-axis is already known.

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