Question

Which graph, or graphs, are proportional? Select all that apply.

Four first quadrant coordinate planes labeled A through D. Salt is on the x axis and Flour is on the y axis. Each graph is linear. Graph A starts at point 0,0 and passes through point 8,8. Graph B starts at point 3,0 and passes through point 1,10. Graph C starts at point 0,4 and passes through point 10,9. Graph D starts at point 0,0 and passes through point 4,8.

Answer 1

Answer: A is the only graph proportional with itself

Explanation:

Graph A Equation - (y = x)

Graph B Equation - (y = -5x + 15)

Graph C Equation - (y = (1/2)x + 4)

Graph D Equation - (y = 2x)