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- anonymous

really need help. dont understand
Given the points (2, 3) and (6, 8), write the point-slope form of the equation.
A. y - 3 = x - 2
B. y - 3 = 5/4 (x - 2)
C. y - 8 = 4/5 (x - 6)

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- anonymous

- schrodinger

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- anonymous

Do you know what point slope form is?

- anonymous

Start by finding the slope between the two points: (2, 3) and (6, 8)

- anonymous

Once you have the slope between the two points, use of the points and the point slope formula to create the proper equatioo.

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- anonymous

*equation

- anonymous

how do i find the slope?

- anonymous

Subbtract the y-values and then subtract the x values. Then divide the resultant y values over the x values.

- anonymous

(2, 3) and (6, 8), the y values are 8 and 3. the x values are 6 and 2.
So 8-3=5 and 6-2=4. Now divide 5/4... This is your slope.

- anonymous

the slope is 5/4 or do i divide that first then i will have the slope?

- anonymous

5/4 is the slope

- anonymous

ok now what do i do next?

- anonymous

now use the formula y-y1=m(x-x1).
Replace m with the slope that you just found. and x1,y1 with one of teh coordinate points that were give.

- anonymous

The annual interest rate of Jacques' savings account is 3.6%, and simple interest is calculated monthly. What is the periodic interest rate of Jacques' account?

- anonymous

where would i put the coordinate that i choose?

- anonymous

y-y1=m(x-x1). So replace m with 5/4.. This will look like y-y1=5/4(x-x1).
Now say you chose to use the point (2, 3).
This will look like y-3=5/4(x-2)
If you were to use the point (6, 8), you will get something like
y-8=5/4(x-6)
both y-8=5/4(x-6) and y-3=5/4(x-2) are the same answers. It just will take some math to work them around to notice that.

- anonymous

so it could be either one of those answers?

- anonymous

Yes

- anonymous

thank you so much for your time and all of your help. i truly appreciate it

- anonymous

But look what choices you have in the multiple choice. The only one that matches that is
B: y-3=5/4(x-2)

- anonymous

ok thank you

- anonymous

Yep

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