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)?












A)
1



B)
2



C)
4



D)
9

Answer 1

@paki or anybody else help me

Answer 2

find the rate of growth by taking the relative difference between the know points

Answer 3

\[\frac{\mathrm dy}{\mathrm dx} = m=\frac{y_2-y_1}{x_2-x_1}\]

Answer 4

@iambatman

Answer 5

@roz_mar23

Answer 6

the answer is 4

Answer 7

if the rate grow is constant , this function is takes the number of week and give you the tall of the planet.
f(x) =y , x number of weeks and y is tall of planet.

given :- y(3) =12cm and y(5) = 20cm

Answer 8

to know the constant rate of growing we must to know how many growing in one week or to know the slope of the function :-
slope m = (y1-y2)/(x1-x2)

Answer 9

(5,20) and (3,12);
m =(20-12)/(5-3) = 4;
this mean the planet is growing 4cm every week;
functions is y =4x;
y(1) = 4cm this answer of the question