Based on data, here is a regression line comparing the variables y = mass of a bar of soap in grams and x = number of days soap has been used: Predicted y = 78.5 – 1.8x. Choose the correct interpretation for the slope:

A. A brand-new bar of soap that has been used zero days will be approximately 78.5 grams.
B. For every gram in mass, the predicted number of days it takes to lose that mass is 1.8.
C. For every day the soap is used, the predicted mass of the soap will increase by 1.8 grams.
D. For every day the soap is used, the predicted mass of the soap will decrease by 1.8 grams.
E. For every gram in mass, the predicted number of days it takes to gain that mass is 1.8 days.

D .For every day the soap is used, the predicted mass of the soap will decrease by 1.8 grams.

Step-by-step explanation:

The given regression equation is

Predicted y = 78.5 – 1.8x where,  y = mass of a bar of soap in grams and x = number of days soap has been used.

Here, slope=b=-1.8.

Slope depicts the unit increase in predicted variable due to change in independent variable.

The given slope -1.8 shows that due to change in number of days soap is used the predicted mass of the soap decreases by 1.8 units. So, we can say that "For every day the soap is used, the predicted mass of the soap will decrease by 1.8 grams".

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!

1 + (6 / x - 1)

step-by-step explanation:

divide using polynomial division.