Question

What is the slope of 3x + 7y = 42?

Answer 1

I found: `-3/7`

Explanation:

In this case you can write your equation in Slope-Intercept form by collecting `y` on one side to get the form:
`y=mx+c`
where `m` is the slope.
So you get:
`y=-3/7x+42/7`
`y=-3/7x+6`
so now you can read the slope as `m`:
`m=-3/7`
Graphically:
graph{-(3/7)x+6 [-18.02, 18.01, -9.01, 9.01]}