I don't understand Linear Functions. This is what it states write the rule for the linear function.
x y
-3 -17
-1 -7
1 3
3 13
using (1,3) and (3,13):
m=______=_______=_______
How do I figure this out?

Question

I don't understand Linear Functions. This is what it states write the rule for the linear function.
x       y
-3    -17
-1    -7
  1      3
  3     13
using (1,3) and (3,13):
m=______=_______=_______
How do I figure this out?

anonymous · Answer

y=mx+c where c is the y-intercept and m is the gradient.

$$m=\frac{y_2-y_1}{x_2-x_1}$$

anonymous · Answer

how did you get that?
I'm a big dummy lol

anonymous · Answer

These are the rule to find out the equation of a straight line.

All you need to do to find the gradient is plug in the values for the two points.

anonymous · Answer

ok so if I'm looking at the graphand I'm using 1,3 and 3,13 then the m= what? see I don't get it. When I look at the graph I see where the 1,3 is but I don't get how to make the m= anything

anonymous · Answer

(1,3) --> (x1,y1)  and (3,13) ---> (x2,y2)

So $$m=\frac{y_2-y_1}{x_2-x_1}$$$$=\frac{13-3}{3-1}$$$$=\frac{10}{2}$$$$=5$$