Question

Please Help!!!

Answer 1

Shoot

Answer 2

first we find the slope by using the slope formula
slope(m) = (y2 - y1) / (x2 - x1)
our points are :
(4,1)...x1 = 4 and y1 = 1
(5,2)...x2 = 5 and y2 = 2
now we sub
slope(m) = (2 - 1) / (5 - 4)
can you finish and tell me the slope ?

Answer 3

1/1

Answer 4

yes...or just 1

Now we use y = mx + b
slope (m) = 1
you can use either of your points...(5,2)...x = 5 and y = 2
and since we know m and we have our x and y points, all we need to do is find b, the y intercept.
now we sub
y = mx + b
2 = 1(5) + b
can you finish and solve for b, the y intercept ?

Answer 5

are you stuck ??

Answer 6

yes

Answer 7

do you understand how I arrived at :
2 = 1(5) + b ??

Answer 8

yes i got that part

Answer 9

2 = 1(5) + b ---- solving for b
2 = 5 + b -- subtract 5 from both sides
2 - 5 = 5 - 5 + b -- combine terms
-3 = b
still with me so far ? questions ?

Answer 10

oh ok

Answer 11

so now we have the equation : y = 1x + (-3).....or y = x - 3
understand that ?

Answer 12

yes i think so

Answer 13

because m , the slope, is 1 and b, the y intercept, is -3
I took out the (x,y) points and subbed everything else back into y = mx + b and got :
y = 1x + (-3) which basically breaks down to y = x - 3

now we need it in standard form which is : Ax + By = C
A cannot be negative and there can be no fractions.

y = x - 3 --- subtract x from both sides
-x + y = -3 -- multiply by -1 because we do not want A to be negative
x - y = 3 <== here is your standard form

any questions ?

Answer 14

ts kind confusing

Answer 15

It can get confusing with all the formulas and stuff...just remember, that in y = mx + b, the slope is in the m position and the y intercept is in the b position. It is just gonna take practice at doing these types of problems. But soon, you will be helping others learn it.

Answer 16

ok thanks

Answer 17

no problem :)