Question

How do you write the equation of a line in slope intercept, point slope and standard form given (1,5) and (-4.2)?

Answer 1

`y=-4.2x+9.2`

Explanation:

The standard point slope line equation for a point `(x1,y1)` and slope `m` is :
`(y-y1)=m*(x-x1)`
thus, we have `(1,5)` and `-4.2`
`(y-5)=-4.2*(x-1)`
`y-5=-4.2x+4.2`
`y=-4.2x+9.2`