Question

The rate at which a plant grows is constant. At the 3rd week it is 12 inches tall and at the 5th week it is 20 inches tall. If this information is plotted on a coordinate plane, what is the y-coordinate of the the point (1, y)?

Answer 1

I don't know what is meant by this question at all.
So, SORRY as I couldn't help you..

Answer 2

Answer:

4

Step-by-step explanation:

Plot the given information on coordinate plane to get the answer

Refer the attached graph

So, referring the graph we scan see that at x = 1, y is 4

Another way

At the 3rd week it is 12 inches tall

$(x_1,y_1)=(3,12)$

At the 5th week it is 20 inches tall.

$(x_2,y_2)=(5,20)$

So, to find the equation which represents the situation we will use two point slope form :

$y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

Substitute the values

$y-12=\frac{20-12}{5-3}(x-3)$

$y-12=4(x-3)$

$y-12=4x-12$

$y=4x$

So, when x =1

$y=4(1)=4$

The y-coordinate of the the point (1, y) = 4