Who likes math?

Question

can someone tell me the answer to this question?

A line with the equation, Y = 2x plus b passes through the given point. Find the value of b.

Given Point: (2, -8)

if you do know the answer, how on earth did you find if?!

- Joel

Answer 1

you have equation y=2x+b, right?
so you just plug in the point for x and y:
y=2x+b
-8=2(2)+b
-8=4+b
b=-12

Hope that helps!

Answer 2

if y=2x+b passes through the point (x=2 , y=-8)then -8 = 2*2+b = 4+b (otherwise the line would not pass through that point because x=2,y=8 would not be one of the solutions to the equation).

subtract 4 from both sides and you get -12=b

Answer 3

As the point lies on the line, the equation must be true for that point too. So just set the coordinates in the equation an solve:

-8 = 2*2 + b and you get that b = -8 - 4 = -12

That really is not dificult !!

Answer 4

given points: (2,-8)

ur equation is: y=2x+b
use ur given points 2 is x and -8 is y
org. equation: y= 2x+b
-8= 2(2)+b
-8=4+b(subtract 4 from both sides)
-8-4=4-4+b(4-4 cancel out)(-8-4 is -12)
-12=b is ur answer

check ur answer start with org. equation
y=2x+b
-8=2(2)-12
-8=4-12
-8= -8

Answer 5

you plug in your given point into the equation so,

y=2x+b
-8=2(2)+b
-8=4+b
-4 -4
------------
-12=b

Answer 6

The slope-intercept form:
y=mx+b

For this problem, plug in (2,-8) into the x and y values:
-8=2(2)+b
-8=4+b
b=-12

Check:
-8=2(2)-12
-8=4-12
-8=-8

I hope this helps!

Answer 7

b = -12, x=2, y=18

Answer 8

Simply plug in your point to find b:
y = 2x + b, so
-8 = 2(2) + b.
b = -12.

Answer 9

Joel this is Zach your not going to pass Winers class anyway thus you don't need to do you homework............Try the Fair line method.

Answer 10

HI