Question

What is the constant of variation, k, of the direct variation, y = kx, through (–3, 2)?

k = –k equals negative StartFraction 3 Over 2 EndFraction.
k = –k equals StartFraction 2 Over 3 EndFraction.
k = k equals StartFraction 2 Over 3 EndFraction.
k = k equals StartFraction 3 Over 2 EndFraction.

Answer 1

Use 2 = k(−3). So k = 2/(−3) = −2/3.

Answer: k = −2/3.