If #y=-5# when #x=2#, what is #y# when #x=8#?

1 Answer
Mia
Nov 19, 2016

#y=-20#

Explanation:

Evaluating #y# is determined by applying proportionality.
#" "#
Knowing that:
#" "#
If #a/b=c/d" "# then#" "axxd = bxxc#
#" "#
#" "#
#2/(-5)=8/y#
#" "#
#rArry=(-5xx8)/2#
#" "#
#rArry=-40/2#
#" '#
#rArry=-20#

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