Choose the equation below that represents the line passing through the point (-3, -1) with a slope of 4

Question

johnweldon1993 · Answer

you can use the equaation

$$\large y - y_0 = m(x - x_0)$$

you plug in you slope for 'm' ...your x coordinate for Xo and your y coordinate for Yo

anonymous · Answer

how do I know what else to put for the x1, and y1?

johnweldon1993 · Answer

What do you mean?

well you leave the 'y' and the 'x' alone...those are part of your final equation...the only thing you worry about in that equation are 'm' 'Xo' and 'Yo'

you have slope (4) this is your 'm'
you have the point (-3 , -1) these are you x and y coordinates....just replace everything

anonymous · Answer

I still don't understand.. I tried plugging in the numbers into the equation, and the answer I got doesn't match any of the answers I have available.

johnweldon1993 · Answer

So what I get is...

$$\large y - y_0 = m(x - x_0)$$

after replacing everything with the numbers you have I get:

$$\large y - (-1) = 4(x - (-3))$$

so lets simplify that a bit...

$$\large y + 1 = 4(x + 3)$$

now lets distribute out that 4...

$$\large y + 1 = 4x + 12$$

And finally subtract 1 from both sides...

$$\large y  = 4x + 11$$

johnweldon1993 · Answer

Does that make more sense @jocelynsalcedo ?

anonymous · Answer

my problem was I didn't distribute. thanks.

johnweldon1993 · Answer

Ahh okay....glad you understand now.....and anytme! :)