Does anybody know this if so can you help me explain and do it for brainlist ..

Step-by-step explanation:

x1 and x2 are the coordinates that come first. (8,1)

x2 and y2 are the coordinates that come after (10,3)

You plug it into the formula.

m=  3-1 =2

     10-8 =2

2/2 simply to 1

1. the slope =1 for the first one.

You can double check your work by looking up a slope formula calculator.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

step-by-step explanation: