+0  
 
0
30
1
avatar+604 

At what point does the line containing the points $(1, 7)$ and $(3, 11)$ intersect the $y$-axis? Express your answer as an ordered pair.

gueesstt  Apr 22, 2018
Sort: 

1+0 Answers

 #1
avatar+86613 
+1

The slope of the line  is    [ 11 - 7 ] / [ 3 - 1]  =   4/2  =  2

 

So....using the point (1,7) we can write the equation of a line passing through the two given points as

 

y = 2(x - 1) + 7

 

y = 2x - 2 + 7

 

y  = 2x + 5

 

In the form y  = mx + b,  "b"  is  y intercept....and where the line intercepts the y axis, the x value of the coordinate  = 0

 

So

 

(0, 5)  is the y intercept 

 

 

cool cool cool

CPhill  Apr 22, 2018

26 Online Users

avatar
avatar
avatar
New Privacy Policy (May 2018)
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  Privacy Policy