The equation of a line is y = 2x + 3. What is the equation of the line that is parallel to the first line and passes through (2, –1)?

Question

anonymous · Answer

what's the slope of y = 2x + 3 ?

anonymous · Answer

2x

anonymous · Answer

just 2 actually. :)
and parallel lines have the same slope so the slope of the parallel line is also 2.
You can write the equation in point slope form
$$y-y_1=m(x-x_1)$$
m is the slope, so that's 2
(x_1,y_1) is the point so that's (2, -1)

anonymous · Answer

so the nwser is 2x+y=-1

anonymous · Answer

y + 1 = 2(x - 2)
y + 1 = 2x - 4
y = 2x - 5
2x - y = 5

anonymous · Answer

y = 2x – 5 can it be written like this

anonymous · Answer

yes that's slope intercept form. 
y + 1 = 2(x - 2) is point slope form
2x - y = 5 is standard form
3 different ways to write the same equation

anonymous · Answer

thanks very much can you help me with some more