Linear formulas and equations: Linear functions
Composing a linear formula
Compose a linear formula based on the table below.
Give your answer in the form #y=a\cdot x+b# for suitable numbers #a# and #b#.
#x# | #-20# | #-15# | #-10# | #-5# | #0# | #5# | #10# | #15# | #20# |
#y# | #-6# | #-5# | #-4# | #-3# | #-2# | #-1# | #0# | #1# | #2# |
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