Method 1: Using Slope Intercept FormSubstitute the slope from original line (3 in this case) into the equation of the line y = 3x + b.Substitute the given point (1,7) into the x and y values 7 = 3(1) + b.Solve for b (the y-intercept)Substitute this value for 'b' in the slope intercept form equation y = 3x + 4.
