8.5E

Remember you can use menu 3,1 for this question (fill in y/x=y/x , (x or y depending on what youre looking for)

The cost for electricity varies directly with the amount of kilowatt-hours of electricity used. The cost for using 1,079 kilowatt-hours of electricity was $129.48. What was the cost for using 908 kilowatt-hours of electricity?

• $41.52

• $153.86

• $75.67

• $108.96

• 30

• 40

• -40

• -30

Which equation represents a direct variation?

• y=3x+2

• y=x−4

If y varies directly with x and y=12 , when x=4, what is the constant of variation?

• 3

• 16

• 48

• 8

Tags

CCSS.8.EE.B.5

What is the graph of a direct variation relationship?

• A line that curves upward

• A line that crosses the y-axis above zero

• A line that passes through the origin (0,0)

• A parabola

A car travels at a constant speed. The distance it travels varies directly with time. If the car goes 120 miles in 2 hours, how far will it go in 5 hours?

• 200 miles

• 240 miles

• 300 miles

• 400 miles

The cost of apples varies directly with the weight in pounds. If 3 pounds of apples cost $7.50, how much would 4.5 pounds cost?

• $11.25

• $11.00

• $9.00

• $9.75