In this graph, Write the equation of the line in fully simplified slope-intercept form. Please help me with this equation! I need help

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

What is not true about kl and mn? what is mn? (show your work)

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?