Increase £1.20 by a quarter(1/4)

The time spent dancing (minutes) and the amount of calories burned can be modeled by the equation c= 5.5t which table of values matches the equation and includes only viable solutions

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints