Y-6=4(x-1)
y-6=4x-4
y=4x-4+6
y=4x+2
Chen checked the temperature 14 times at dawn and at dusk
(-4)^2-4(1)(5)
16-4(1)(5)
16-4(5)
16-20
-4
The discriminant is negative so there are no real number solutions.
Area = L x W
Area = (y+5) (y-5)
Use Foil to multipy (First, Outer, Inner, Last)
Area = y² -5y + 5y -25
Area = y² -25