remember , when writing a equation, fraction or a negative do not add any spaces for example -3/4 is correct but - 3 / 4 would be incorrect

Answer:
a) infinite values of y are possible , one such value is -7 for x=0
b) 35
Step-by-step explanation:
a) this is because for every value of x there would be a corresponding value of y
b) the equation follows equation of straight line i.e y=mx+c , so , m=35
hope the above solution will help you