Can someone help me plz

81 is d answer

Step-by-step explanation:

x = 9y

= > 9y + y = 90 substitution

= > y = 9

x =9y = 81 degree

Slope = 15

Interpretation see below

Step-by-step explanation:

The slope would be the change in y with change in x.

The interpretation of slope is "for every unit change in x, y changes by m" (given slope is m).

Now, let's find the change in y and change in x [let g(x) be y].

Change in y = 400 - 325 = 75

Change in x = 5 - 0 = 5

So we have slope of

75/5 = 15

This means "for every unit change in x, y changes (increases) by 15".

In this context, it will mean "balance in the bank account increases by $15 every day"