Question

Does the point (-1, 2) lie on the graph of y = -2x + 3?

Answer 1

`(-1,2)` does not lie on `y=-2x+3`

Explanation:

`(color(red)(-1),color(blue)(2))` is a point on `color(blue)(y)=-2color(red)(x)+3`
if (and only if)
`y=color(blue)(2)` when `x=color(red)(-1)` in `y=-2x+3`

`y=-2(color(red)(-1))+3=+2+3=color(green)(5)`

Since `color(green)(5) != color(blue)(2)`
`(-1,2)` does not lie on the line `y=-2x+3`