Question

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

Answer 1

`"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]}