Which equation represents a nonproportional relationship?
a. y=3x+0
b. y=1/3x
c. y=3x+5
d. y=3x

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?