Use the digits 1,3,4,and 7 to create two whole numbers whose product is estimated to be about 600

What scale factor was applied to the first rectangle to get the resulting image interior answer as a decimal in the box

Can someone me and do the problem plz so i can understand it more better

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)