fan and medal help please
The function below models the correlation between the number of hours a plant is kept in sunlight (x) and the height (y), in mm, to which it grows:

y = 4 + 2x

What does the y-intercept of this function represent?

The original height of the plant was 4 mm.
The original height of the plant was 2 mm.
The height of the plant increases by 2 mm for every hour of sunlight it receives.
The height of the plant increases by 4 mm for every hour of sunlight it receives.

Question

fan and medal help please
The function below models the correlation between the number of hours a plant is kept in sunlight (x) and the height (y), in mm, to which it grows:

y = 4 + 2x

What does the y-intercept of this function represent?

 The original height of the plant was 4 mm.
 The original height of the plant was 2 mm.
 The height of the plant increases by 2 mm for every hour of sunlight it receives.
 The height of the plant increases by 4 mm for every hour of sunlight it receives.

anonymous · Answer

@Savane0621  and @lizzyrockefeller

anonymous · Answer

do y= mx+b

wmj259 · Answer

If you have x= 1 hour, you would add the 4 mm that it "born" with. So what do you think if x=0, whats y?

anonymous · Answer

Plant stays the same height.

If x=0 the plant doesn't grow, it's original length was y=2 (mm) so it stays at that height.

anonymous · Answer

I dont know im retarded ... can someone walk me through the equation or show me how to do it,,, please

wmj259 · Answer

It has 4mm already.

wmj259 · Answer

If you graph that function it'll be y=2x+4. Tell me what you y-intercept is. My gosh.

wmj259 · Answer

Your original function is y=2x+4. Right?

anonymous · Answer

yes

wmj259 · Answer

y=mx+b
Y is the output (mm)
m is the slope of the line
x is what you insert
b is a CONSTANT (if x =0 what is left? B is left)
So if you have zero hours of sunlight, what happens to the 4mm that is a constant?

wmj259 · Answer

;)

wmj259 · Answer

Good day.