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What is the equation of the following line written in general form? (The y-intercept is -1.).

A. -2x - y - 1 = 0
B. 2x + y - 1 = 0
C. 2x - y - 1 = 0

What is the equation of the following line written in general form? (The y-intercept-example-1

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Answer:

The answer is C.

Explanation:

In the graph above, it is a positive gradient so option A and B cannot be applied.

Next you have to look at the y-intercept where the line touches the y-axis so -1 is the y-intercept.

The slope-form equation is y = mx + b where m represents gradient amd b is y-intercept :

Option A,


- 2x - y - 1 = 0


y = - 2x - 1 \: (incorrect \: m)

Option B,


2x + y - 1 = 0


y = - 2x + 1 \: (incorrect \: m \: and \: b)

Option C,


2x - y - 1 = 0


y = 2x - 1 \: (correct \: m \: and \: b)

What is the equation of the following line written in general form? (The y-intercept-example-1
User Zhi Wang
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