Line ab contains points a (0, 1) and b (1, 5). the slope of line ab is


Asked by maham237 @ in Mathematics viewed by 422 People


Line AB contains points A (0, 1) and B (1, 5). The slope of line AB is
−4
negative 1 over 4
1 over 4
4

I'm thinking it's D. Just need confirmation. Thank you! (:

Answered by maham237 @



General equation of line is y=mx+n where m is slope and n is point on y-axis. So just use points in question to determine what m and n must be. Let me show you.

For A(0,1), put this point in y=mx+n then you have 1=m.0+n Hence n=1

Now use second one that is B(1,5), then you get 5=m.1+1 since n=1. Finally you get m=4 that is slope.

So you are right. It is D

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