For the function f(n) = 2n - 7, determine n when f(n) = 11
(its on goformative and i got the answer to be 15 but it says its wrong.

n=9

Step-by-step explanation:

f(n) = 2n - 7

we are asked to determine the value of n for which

f(n) = 11

Hence

11=2n-7

now we solve it for n

adding above equation 7 on both sides

11+7=2n-7+7

18=2n

dividing by 2 on both sides we get

9=n

Hence for n = 9 , f(n) = 11

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.