3) y = - 2x + 4
4) y = 5x - 4
Slope intercept form formula: y = m x + b
m = slope
b = y-intercept
3)
Find the slope.
(2,0) & (0,4)
slope: y2-y1/x2-x1 ---> 4-0/0-2
Simplify
4-0/0-2 = 4/-2 = -2
m = -2
Find the y-intercept:
the point the sits on the y axis is, (0,4) so, b = 4
Now put it all together in the formula.
y = - 2x + 4
4)
Find the slope.
(4,1) & (0,-4)
slope: y2-y1/x2-x1 ---> -4-1/0-1
Simplify
-4-1/0-1 = -5/-1 = 5
m = 5
Find the y-intercept:
the point the sits on the y axis is, (0,-4) so, b = -4
Now put it all together in the formula.
y = 5x - 4
Hope this helps!
Let me know if you have any questions or need anything else :)