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. you! (:

General equation of line is 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 then you have Hence

Now use second one that is B(1,5), then you get since . Finally you get that is slope.

So you are right. It is D

9sandwiches per hour

Its d so thats how it would would back from 1.0 form three four two