Please i need help i need 5 expressions

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?

Which of the following is the formula for the sequence graphed below

What is the distance between the points 4,10 and -3,-14 on the coordinate plane