Hlo everyone I am Indian boy u all​

Aline passes through the point (2, -4) and has a slope of 0, what is the equation of the line? plz fast

Lilianna uses 3/4 calories per minute just by sitting. she uses 1 more calorie per minute by walking. lilianna uses a total of 12 1/4 calories walking to the park. lilianna uses the equation, d(.75+1)=12.25 to represent the situation. what does the variable d represent in the equation?

What aspects of lines have to be diffrent