Formulate but do not solve the problem. kelly fisher invested a total of $20,000 in two municipal bonds that have yields of 8% and 9% interest per year, respectively. if the interest kelly receives from the bonds in a year is $1680, how much did she invest in each bond? (let x and y denote the amount, in dollars, invested at 8% and 9%, respectively.)
= 20,000 = 1680

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)