5y = 2x + 20
y = (2/5)x + 4
The slope is 2/5. A parallel line has the same slope, so its equation will be:
y = (2/5)x + b
To find b, plug in the (x,y) values from the given point, (-1,3), and solve for b:
y = (2/5)x + b
3 = (2/5)(-1) + b
3 = -2/5 + b
17/5 = b
Final equation: y = (2/5)x + (17/5)
