How do you graph #-4x+5y=-20# by plotting points?

1 Answer
Jim G.
Jul 10, 2018

#"see explanation"#

Explanation:

#"one way is to find the intercepts, that is where the graph"#
#"crosses the x and y axes"#

#• " let x = 0, in the equation for y-intercept"#

#• " let y = 0, in the equation for x-intercept"#

#x=0rArr5y=-20rArry=-4larrcolor(red)"y-intercept"#

#y=0rArr-4x=-20rArrx=5larrcolor(red)"x-intercept"#

#"Plot the points "(0,-4)" and "(5,0)#

#"Draw a straight line through them for graph"#
graph{(y-4/5x+4)((x-0)^2+(y+4)^2-0.04)((x-5)^2+(y-0)^2-0.04)=0 [-10, 10, -5, 5]}

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