How do you graph #y=9/2x-7# by plotting points?

1 Answer
MeneerNask
Mar 1, 2016

Since this is a linear function, you only need two points.

Explanation:

Usually #x=0# is a good start. This will give you #(0,-7)#
The other #x# to choose better be even, to avoid fractions.
Let's take #x=4# (just a hunch). This will give you #(4,11)#
Just to make sure (and check yourself in drawing) you may choose a third point #x=-2->(-2,-16)#

Now draw a straight line through two of the points and make sure it also goes through the third:
graph{4.5x-7 [-41.1, 41.1, -20.56, 20.56]}

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