find the equation of a straight line joining the points (6,9) and (4,7). Please help im bad at mathematic :( and please do a calculation too.

y = x+3

Step-by-step explanation:

First step is to find the slope

m = ( y2-y1)/(x2-x1)

   = ( 7-9)/(4 - 6)

   = -2 / -2

  = 1

The we can put is in slope intercept form

y = mx+b where m is the slope and b is the y intercept

y = 1x+b

Putting in one of the points

9 = 1*6+b

Subtracting 6

9-6 = b

3=b

y = 1x+3

y = x+3

Step-by-step explanation:

Solve for slope first.

The slope can be found through 2 points.

Using slope-intercept form.

Let x = 6 and y = 9.

In your problem which ask to calculate the length in meters the side of EH on the photocopied image and in my calculation and with the step by step procedure, i came up with an answer base with the data you have given the length of the side of EH is 15