What is the equation of the line?

answer:

y=1/2x+2

step-by-step explanation:

first you start by finding the slope. also known as rise/run. the line rises 1 over 2 run. so your slope is 1/2. you then make a equation and fill in the numbers and solve. if y=1/2x-4 doesn't work the only other option is y=1/2+2.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value