I really don’t get this and I just want to understand it.. Someone please help.. Will mark Brainliest

Answer:
f(x) = 2/3x-2
Step-by-step explanation:
We know the y intercept (where it crosses the y axis) is -2
We can find the slope from two points
(0,-2) and (3,0)
m = (y2-y1)/(x2-x1)
= (0--2)/(3-0)
= (0+2)/(3-0)
= 2/3
The slope is 2/3
The equation can be written in the form
y= mx+b where m is the slope and b is the y intercept
y = 2/3x-2
Replace y with f(x) for it to be in function notation
f(x) = 2/3x-2