The table shows the height of a flower as it grows. what equation in slope-intercept form gives the flower's height at any time? time (weeks) height (inches) 2                             12 4                             17 6                             22 8                             27 a. y = (5/2)x+7 b. y = (5/2)x+12 c. y = (5)x + 7 d. y= (5) x + 12

Use the table to draw the graph of height(y-axis) against week(x-axis).
The graph is a straight line. 
Find the gradient of the graph as the first step.
Gradient = (y2-y1)/(x2-x1)

              = (17-12)/(4-2)
              = 5/2
Use this gradient to find the equation of the line. Use one of the point from the table (e.g. (8,27)) and another general point (x,y).

∴5/2=(y-27)/(8-x)
   5/2 (x-8) = y-27
    (5/2)x - 20 = y-27
    
   y=(5/2)x - 20 + 27

  y = (5/2)x + 7

The answer is A
   

y = 

Explanation:
The general form of the linear equation is:
y = mx + c
where:
m is the slope
c is the y-intercept

1- getting the slope:
slope can be calculated as follows:
m = 

I will use the points (2,12) and (8,27) to get the slope. You can choose any other two points and you will get the same answer.
m = 

The equation of the line now is:
y = 

2- getting the y-intercept:
To get the y-intercept (c), we will use any of the given points, substitute in teh equation and solve for c.
I will use the point (6,22) as follows:
y = 

22 = 

22 = 15 + c
c = 7

Based on teh above, the equation of the line is:
y = 

Hope this helps :)

Subtracting is the opposite of adding