Slope, y intercept problem

[hbtcutie92]

A straight line with a slope of 5 containes points (1,2) and (3, k.) Find the value of k.

For this problem, do you use y= mx + b like
2= 5/1x + b

 

[royhaas]

You have two equations:
2 = 5(1)+b
k = 5(3)+b

 

[hbtcutie92]

is the answer>>>

is k equals twelve the answer?

 

[royhaas]

Yes.

 

[tkhunny]

A straight line with a slope of 5 containes points (1,2) and (3, k.) Find the value of k.

For this problem, do you use y= mx + b like
2= 5/1x + b

Why not just use the slope?

5 = (k-2)/(3-1) = (k-2)/2

You tell us if k = 12. No guessing. Know!

 

[hbtcutie92]

yes..

im right ill prove it

5= 12-2/3-1 = 12-2/2=
5 = 10/2+10/2
10/2 = 5
5=5=5

 

[tkhunny]

"5= 12-2/3-1 = 12-2/2=10/2=5 "

Nasty notation. Perhaps you mean 5 = (12-2)/(3-1) = (12-2)/2 = 10/2 = 5

"5 = 10/2+10/2"

What? I can't even guess what that might mean.

"10/2 = 5 "

This is good.

"5=5=5 "

Is there an echo in here?

Please notice that notation matters. You studied the "Order of Operations" for a reason. 12-2/3-1 = 36/3 - 2/3 - 3/3 = 31/3 Not all that close to 5.