Q1) How did we prove today that the given quadrilateral was a parallelogram?
a) We used the slope formula to show opposite sides were parallel
b) We used the distance formula to show opposite sides were congruent
c) We used the midpoint formula to show the diagonals bisected each other

need points to ask question

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

read more on -

step-by-step explanation: