3 = 3+b
b cannot be 1 or 3=3(1)+1 gives 3=4
Given:
Slope = 3
Coordinate (1, 3) is on the line.
Solution:
y = mx + b
Substitute given slope and coordinate and
solve for b;
slope, m = 3
Coordinate (1, 3)
x =1
y = 3
3 = 3(1) + b
b = 0 Why they got b=0 and not not 1 for b
Substitute into general
form;
y = 3x + 0
y = 3x