How do you graph y = -4x + 8 on a coordinate graph?

1 Answer
Alan P.
Sep 11, 2015

Evaluate the given equation for a minimum of 2 values of #x#; plot the corresponding points on the Cartesian plane; draw a line through the points.
graph{-4x+8 [-4.26, 10, -1, 10]}

Explanation:

Typical data points to plot would be the #x# and #y# intercepts
#color(white)("XXX")x=0 rarr y=8#
#color(white)("XXX")y=0 rarr x=2#
#rArr#
#color(white)("XXX")(2,8)# and #(2,0)# are 2 points on the line

For verification purposes you might want to plot a third point,
for example #x=1 rarr y =4#
#rArr#
#color(white)("XXX")(1,4)# is also a point on the line

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