Question 1166940
the linear equation is y=m*x+b
m is the slope.
b is the y-intercept.


in this problem:
y = the total number of phones that are installed
x = the number of weeks from march 1.


on march 1, x = 0.
this makes the y-intercept of the equation equal to 200 because the y-intercept is the value of y when x = 0.
when x = 0, the equation becomes y = m*0 + b which simplifies to y = b.
the equation becomes y=m*x+200
each week, 5 new phones are installed.
this makes m = 5.
the equation becomes y=5x+200


that should be your solution.
when x = 0, y = 200
when x = 1, y = 205
when x = 2, y = 210
when x = 10, y = 250
etc.....


x = 0 means march 1.
x = 1 means 1 week after march 1.
x = 2 means 2 weeks after march 1.
x = 10 means 10 weeks after march 1.
etc.....


the equation can be graphed as shown below.


<img src = "http://theo.x10hosting.com/2020/101002.jpg" >


the actual dates can be found as follows:
x = 0 is march 1
x = 1 is march 8
x = 2 is march 15
x = 10 is may 10
etc.....


you just look at the calendar and count the weeks from march 1.