Maggie only wore her fitness tracker on two of the days that she trained. so, from her fitness tracker she verified that on the third day she biked 20 miles, and on the eighth day she biked 35 miles. use these two data points to determine the equation of the line of best fit for maggie's data.

y = 3x + 11 Since we only have 2 data points, let's assume a linear relationship for the function. So the formula will be of the form y = ax+b where a = slope of the line b = y-intercept of the line. Let's calculate the slope first. The slope is the change in y divided by the change in x. So (35-20)/(8-3) = 15/5 = 3 Our equation now becomes y = 3x + b Let's calculate b. Do so by substituting the x and y values of a known point. It doesn't matter which point you use. So 20 = 3*3 + b 20 = 9 + b 11 = b And to prove that it doesn't matter which point, let's do it again. 35 = 3*8 + b 35 = 24 + b 11 = b So the y intercept is 11. And the equation for the line is now y = 3x + 11

The last one is right