Question

a line contains the point (8,-5). if the slope of the line is 5/7, write the equation of the line using point slope form.
a. y-5=5/7 (x+8)
b. y + 5 = -5/8 (x+7)
c. y+8= 5/7( x-5)
d. y+5= 5/7(x-8)

Answer 1

@Zale101

Answer 2

Member what we did in the previous post? It is the same thing except that the slope is not 0, it is 5/7. And the point is already give, which is (8,-5)
So, this equation is perfect for two methods, the point slope formula or slope intercept form.
For point slope formula:
\(y-\color{red}{y_1 }=m(x-\color{red}{x_1})\)
\(y+5=\frac{5}{7}(x-8)\)

For slope intercept form:
\(y=mx+b\)
Plug everything in
x,y=8,-5
m=5/7
and solve for b
\(-5=\frac{5}{7}(5)+b\)
and then rewrite the equation with m and slope numbers plugged in.

Answer 3

\(-5=\frac{5}{7}(8)+b\)
The previous one was an error, sorry for that.

Answer 4

so how do i solve it?? do i multiply??

Answer 5

But everything was correct

Answer 6

oh so its a right?!?!?!

Answer 7

You solve the equation from which one looks easier to you. I find this easier for algebra students, it's pretty straight forward
\(y-(-5)=\frac{5}{7}(x-8)\)

Answer 8

so its not a??

Answer 9

It can't be a, it is not the same as this \(y+5=\frac{5}{7}(x-8)\)

Answer 10

And lol, i didnt pay attention to the choices, i would've just choose the first method by using the point slope formula

Answer 11

So which is the right choice?

Answer 12

a?

Answer 13

This choice ? ---> a. y-5=5/7 (x+8)

Answer 14

no it was incorrect. have no idea then

Answer 15

oh ok d then (;

Answer 16

Yes

Answer 17

thx

Answer 18

np, but you already understand how to do these kind of problems now, right?

Answer 19

yes i suppose