which is the direct linear variational equation for the relationship? y varies directly with x and y = 12 when x = 4.
a. y = 2x + 4
b. y = 3x
c. y = x – 8
d. y = x + 8

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value