May someone me im struggling so much im literally about to cry

let A(4,0) and B(8,5)

then to find the equation of line AB

we should find the slope (a) of AB which is:

a = (y2 - y1)/(x2 - x1)

a= (yB - yA)/(xB - xA)

a= 5 - 0 / 8 - 4

a= 5/4

then the equation is y= ax+b

where b is to be determined by substituting either A or B coordinates in the equation,

I'll take both

taking A:

yA= axA+b

0= (5/4)×4+b

b= -5

taking B:

yB= axB+b

5= (5/4)×8+b

b= -5

then the equation of AB is

y=5/4 x -5

answer: options?

step-by-step explanation: