This is an aritmetic series;
a=-10
d=-7--10
d=3
n= 7
Sum=
(2a+(n-1)d)
Sum=
sum=3.5(-20+18)
sum=3.5(-2)
sum=-7
The equation is in y=mx+b form where m represents slope and b represents the y intercept. So begin by graphing the point (0,-5) on the Y axis
Next you look at the slope, slope is rise over run so in this case you would rise or go up 1 from the point (0,-5) and then go left or "run" 2 units
14.20 , 14.210 , 14.240 , 414.200