Question

A line has a slope of and a y-intercept of 3.

Which equations represent the line?

Choose all answers that are correct.
A.http://static.k12.com/bank_packages/files/media/mathml_beb5e1f668ef580c3abf72284867ff45993ca4ce_1.gif

B.http://static.k12.com/bank_packages/files/media/mathml_28d0b0a931a77df797c54e42deeff5ae35f7ce95_1.gif


C.http://static.k12.com/bank_packages/files/media/mathml_5563127cc1b0bd5c6ef4694b381f0a0b7c0e108f_1.gif


D.http://static.k12.com/bank_packages/files/media/mathml_87100d38d1babf18630cb8e66db165c22135c389_1.gif

Answer 1

@peterg2001 @confluxepic @kinggidorah123 @matt101

Answer 2

A slope of...?

Answer 3

-1/2 srry

Answer 4

@matt101

Answer 5

No problem!

Put all these equations in y=mx+b form (isolate the y on the left side). When you have an equation in this form, the m is the slope and the b is the y-intercept. Just see which equation matches your question!

Answer 6

how do u do that?

Answer 7

Just rearrange the equation to solve for y.

So for the first option you have 2y = 6 + x. We want y on its own so let's divide both sides by 2. This gives y = 3 + ½x, which is y = ½x + 3 in y = mx+b form.

In that equation, m=½ and b=3. Even though the y-intercept is 3, we want m=-½. So you'll have to keep going.

Just do this for the remaining 3 options and see which one gives you the right combination of m and b once you've isolated y!