Hello please help me with my homework I am in desperate need asap thank you

Question

1.) The value of y varies directly with x, and y = 343 when x = 49. Find y when x = 8.

A.) 56

B.) 1/7

C.) 7

D.) 49

 

 

2.) Write the inverse variation function given that y varies inversely with x, and y = 5 when x = 5.

A.) y = x

B.) y = 5x

C.) 

D.)

   

   

 

3.) Write the direct variation function given that y varies directly with x, and y = 1.5 when x = 5.

A.) y = 0.3x

B.) x = 0.3y

C.) y = 3x

D.) y = 0.25x

hi please explain and solve and help thanks

Answer 1

1.) y = kx, k = y/x = 343/49 = 7; y = 7x; If x = 8 y = 7·8 = 56. Answer is A.)

2.) y = k/x; k = yx = 5 ·5 = 25; y = 25/x; Answer is D.)

3.) y = kx; k = y/x = 1.5/5 = 0.3; Answer is A.)