Google Sheets, coloring a line depending on another column (conditional formatting for lines)

Question

Imagine I have a table like the following.

Column A is the x-axis, e.g. time. Column B is some condition, e.g. 1 and 0 for yes and no or true and false. Column C has the y-values. I'd like to create a line chart that changes color depending on Column B, as in the following Figure (made manually in GeoGebra).

However, I have absolutely no clue and cannot find anything. Perhaps I am looking for the wrong words.

Answer 1

Formula in B2

=MAP(SEQUENCE(ROWS(FILTER(color, LEN(color)>=0))), color, values,
   LAMBDA(squ, col, val, 
     IF(col=1, 
        IF(AND(OFFSET(col,-1,0)<>1, squ<>1),
          {val,val}, {val,""}),
        IF(OFFSET(col, -1, 0)=1,
          {val,val}, {"", val}))
 ))

Named Ranges

Name	Range	Notes
color	E2:E21	Holds the color flags: =1 or <>1)
values	F2:F21	Contains all the entered values

Chart Customizations

Section	Customization
Setup > Chart type	Line chart
Setup > Data Range	A1:B21,C1:C21
Setup > Combine ranges	Horizontally
Setup > X-axis	Time
Setup > Series	Value01 Value02 ✔️ Use row 1 as headers ✔️ Use column A as labels
Customize > Chart & axis titles                             > Chart title > Title text	Value vs. Time
Customize > Legend > Position	None

   
 

_{Note: I repurposed this chart in another related solution asking about alternating background colors.}