PLS HELP NOW I NEED GOOD GRADES SO I CAN WIN A SCHOOL CONTEST

You've got the points:

(1,1) (2,-2) (3,-5) (4,-8)

First find the slope.

-2-1 / 2-1 = -3/1 = -3

-5- - 2 / 3-2 = -3/1 = -3

-8 - -5/ 4-3 = -3/1 = -3

m = -3 = slope

Now plug it into point slope intercept form

y-y₁=m(x-x₁)

y - 1 = -3(x - 1)

y - 1 = -3x +3

y = -3x + 4

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.