Pick two points at random so we can find the slope. I picked (0, 1) and (- 1, 4)
Slope = [tex] \frac{Y2 - Y1}{X2 - X1} [/tex]
(4 - 1) / (- 1 - 0)
3 / - 1
- 3 is the slope.
Now plug this into slope-intercept form y = mx + b
y = - 3x + b
Use either of the points to find the b variable
1 = - 3(0) + b
1 = 0 + b
1 = b
Your equation is y = - 3x + 1
Rate of change is the same as slope so your rate of change is - 3.
The y-intercept is the "b" in slope-intercept form so your y-int is 1.
