Linear functions asap need part a, b, c

(2,225)(5,480)
slope = (480 - 225) / (5 - 2) = 255/3 = 85

y = mx + b
slope(m) = 85
use either of ur points...(2,225)...x = 2 and y = 225
now sub and find b, the y int
225 = 85(2) + b
225 = 170 + b
225 - 170 = b
55 = b

equation is : y = 85x + 55...but we need this in standard form

y = 85x + 55
-85x + y = 55...multiply by -1 to make x positive
85x - y = -55 <== ur standard form equation

function notation : f(x) = 85x + 55

to graph : y = 85x + 55
ur slope is 85...ur y int is (0,55)...ur x int is (-11/17,0)
ur gonna start at (-11/17), and since ur slope is 85, u will go up 85 units and to the right 1 unit and up 85, and to the right 1...and u should cross the y axis (0,55)...I suggest going to desmos graphing calculator so u can see the graph