# ### Author Question: How do I rearrange the y=mx+b equation to find the unknown value of X on my graph? (Read 2249 times)

#### luvbio

• Hero Member
•     • Posts: 623
on: Oct 4, 2013
I am using the formula y=mx+b on a graph, I am trying to find the values of 3 unknown concentrations of DNA on the X axis, how do I rearrange this equation so I can find these hidden values? My straight line equation is y=0.0006x + 0.0247 any help would be great! Thanks.

#### Yolanda

• Hero Member
•     • Posts: 757
Reply #1 on: Oct 4, 2013
y = mx + b
y - b = mx
x = (y - b) / m
y = 0.0006x + 0.0247
y - 0.0247 = 0.0006x
x = (y - 0.0247) / 0.0006

### Need homework help now?

#### federox

• Sr. Member
•    • Posts: 308
Reply #2 on: Oct 4, 2013
(y-b)/m=x

so

(y-0.0247)/0.0006=x

• Newbie
• • Posts: 10
Reply #3 on: Oct 4, 2013
subtract b
then divide by m

y=mx+b
y - b =mx
(y-b)/m = x

#### geoffrey

• Hero Member
•     • Posts: 880
Reply #4 on: Oct 4, 2013
x =    -41.1667 + 1666.67 y

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.