If a line crosses the y-axis at (0, -4) and has a slope of -2, what is the equation of the line?

Question

kainui · Answer

So you need the equation of a line. You already have one! 

y=mx+b

What is m? That's the slope! What is b? That's the y-intercept. Play around with this equation on your graphing calculator so you can see WHY they call them that. They tell you that the y-intercept is -4 and the slope is -2, so you just need to replace m and b with those values, and you're good!

anonymous · Answer

thx

anonymous · Answer

If a line crosses the y-axis at (0, 1) and has a slope of 45, what is the equation of the line?

kainui · Answer

Think about it, you have enough information here to answer this question if you can answer the last one.