+0  
 
+1
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4
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The complete graph of y=f(x), which consists of five line segments, is shown in red below. (On this graph, the distance between grid lines is 1.)

 

 

What is the sum of the $x$-coordinates of all points where $f(x) = 1.8$?

 Jul 19, 2020
 #1
avatar+25880 
+1

Draw a line  at  y = 1.8

   it crosses the graph at 3 points....   read down below those points to get the 'x' values to add together

      first one   x = .9

       second one   x = .....

          third one    x = .......

 Jul 19, 2020
edited by ElectricPavlov  Jul 19, 2020
 #3
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0

maybe im dumb or smth but how do i find those 3 values? I don't know how to graph them

Guest Jul 19, 2020
 #2
avatar+798 
0

maybe im dumb or smth but how do i find those 3 values? I don't know how to graph them

 Jul 19, 2020
edited by Guest  Jul 19, 2020
 #4
avatar+25880 
+2

Here is the graph:

 

 Jul 20, 2020

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