Percent increase and decrease. before: 10 after: 12

The percentage increase:20%

Step-by-step explanation:

Here's why the answer is simple since the Initial Number=10 we know that 20 percent of 10 is 2. Since the number increased by 2, therefore it increased 20 percent.

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7

Step-by-step explanation:

The standard model equation here is

y = mx+b

Now,

x and y are the variables

b is y-intercept, it means it is the value of y-coordinate on y axis where this line intercepts on y-axis

m = slope or rate of change or angle ∅ this line making with x -axis.

now arrange function A according to standard model equation

y = (8)x + 3

now, by comparison of standard and function A

m(A) = 8 and b(A) = 3

For function B

it is given that rate of change or slope is 1 and y-intercept is 4

so for function b

m(B) = 1 and b(B) = 4

Now question is about how much slope of function A is more than slope of function B

m(A)-m(B) = 8-1 = 7

So answer is 7.