Answer:
The money earned increases by $15 for each hour worked.
Step-by-step explanation:
Simply find the slope by using the formula:
m = y2 - y1 / x2 - x1
m = 165 - 105 / 9 - 5
m = 60 / 4
m = 15
Answer:
Step-by-step explanation:
1. 0.4y = x is a direct proportion. It'd be more appropriate to write this as
y = x / 0.4, or y = 2.5x, in which case 2.5 is the constant of proportionality.
2. x = 1 - 2y is not a direct proportion because of the offset (1). A line representing a direct proportion must go through the origin (0, 0); this particular line does not do that.
I think you are referring to the (square root of b^2 - 4ac) in the quadratic formula.
When b^2 - 4ac is less than zero, the solutions to the quadratic equation will be complex (iamginary).
