Solution:
Note that:
- Slope of line = 4
- Given point: (1, 13)
- Point slope form formula: y - y₁ = m(x - x₁)
Use the formula to obtain the equation of the line.
- y - y₁ = m(x - x₁)
- => y - 13 = 4(x - 1)
- => y - 13 = 4x - 4
- => y = 4x - 4 + 13
- => y = 4x + 9
The equation of the line is y = 4x + 9.