The graph at the right shows four different direct variation equations plotted on the same coordinate grid. using what you know about direct variation, calculate the constant of proportionality (k-value) of each relationship and match it to a point on each line. choose from the k-values listed below. some may not be used.

k = -1
k = -9/2
k = 2/9
k = -1/5
k = 1/5
k = 3
k = -2
k = 1

point a __
point b __
point c __
point d __

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!