Instead of making a curve fit line make a straight line

The relationship between two variables y and x is k The following data points are given: Determine the constants a and b by curve-fitting the equation to the data points. Make a plot of y versus x. In the plot show the data points with markers and the curve-fitted equation with a solid line. Use the equation to estimate y at x 23. (The curve fitting can be done by writing the reciprocal of the equation and using a first-order polynomial.)