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Need help on this question I have

Need help on this question I have-example-1
User Zuguang Gu
by
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1 Answer

25 votes
25 votes

Answer:

y = 3x - 6

Explanation:

Slope-interecept form is a "fill-in-the-blank" formula for writing the equation of a line. It is in the form:

y = mx + b

You fill in the slope for m and fill in the y-intercept for b.

You could totally graph these points and see the slope and y-intercept. But here's how to find them on the table.

When x is 0, y is -6. The y-intercept is where x is 0. So here, the y-intercept is -6. That is b. Fill in -6 in place of b.

y = mx + -6

Next pick any two points. I'm using the last two (3,3) and (4,6). Subtract the y's. 6-3 is 3, put that on top of a fraction. Subtract the x's, 4-3 is 1. Put that on the bottom of a fraction. That is the slope, 3/1. That is the m. Fill it in.

y = 3/1 x + -6

Clean it up (simplify)

y = 3x - 6

User Michael Madsen
by
2.6k points