Question

Can someone show me how to do this?
Write the slope-intercept (y = mx + b) form of the equation from the information given.
Slope = -2 and the line goes through the point (-1,3)

Answer 1

3=2+-1?

Answer 2

y = mx + b

where m is the slope
and b is the y-intercept

First plug in the slope, which they gave you as -2 in place of m.

So first plug in -2 in place of m.

What do you get? :)

Answer 3

y = -2x + b

Answer 4

Ok, now they also gave us the point (-1,3)

We need to plug that in to the equation and solve for b.

y = -2x + b

(-1,3) is in the form of (x,y)
So x = -1
y = 3

Plug that into y = -2x + b, and solve for b :)

Answer 5

Ah, @skullpatrol seems to be a mistake in your answer. You plugged in x = -2. The question states x = -1

Answer 6

idk what 'b' could be... and @skullpatrol it's ok

Answer 7

That's what we need to solve for! @abbycross167 :)

Answer 8

So, you plug in x = -1, and y = 3 into y = -2x + b

and then we solve for b :)

Answer 9

3 = -2(-1) + b
b= 2?

Answer 10

3 = -2(-1) + b

3 = 2 + b

1 = b

Answer 11

so it'll be 3 = -2+ 1?

Answer 12

The final equation would be in the form of y = mx + b

where m is the slope
b is the y-intercept

we got m = -2
and b = 1

so we finally get

y = -2x + 1

Answer 13

oh ok, I get it now!!! thank yall very much!!

Answer 14

Thanks for trying :D

Answer 15

Anytime! :D