F (x)=x+3x find f(2)

f(x)=3x-2 find f(-10)

help please

1) f(2) = 8

2) f(-10) = -32

Step-by-step explanation:

Whenever you see a problem that asks something like what f(2) or f(-10) is, it is asking you to substitute whatever number is in the parentheses for every x in the given function.

1) So, to find f(2), substitute 2 for every x in the given function, f(x) = x + 3x and solve:

Thus, for this function, f(2) = 8.

2) Do the same with the second question. Substitute -10 for every x in the given function, f(x) = 3x - 2.

Thus, for this function, f(-10) = -32.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,