Please show all the work and steps thanks

Problem 1: A linear empirical equation was proposed to model a relation between variables x and y:y= a+bx. Six pairs of data points were measured in an experiment, given in the following table. Use the least squares method to estimate the two constants a,b. a) Use a ruler and pencil to draw a straight line on the graph given below. The straight line should visually match the scatted experiment data points. Read the a,b values directly from the graph. (5 points) b) Use the MS Excel function LINEST to estimate a,b and the correlation coefficient rxy (5 points) c) Compare the results from a ) and b )