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"Which of the following points." These words suggest that you will list points, and the answerer needs to select the correct points. Please do that.
If you mean: y = 4.2x-6.3 then it is a straight line equation with a positive slope of 4.2 and a y intercept of -6.3
Points: (1, 5) and (2, 7) Slope: 2 Equation: y = 2x+3
Suppose the equation of the line is y = mx + c where m and c need to be determined. The slope of the line = (difference in y-coordinates of the two given points)/(difference in x-coordinates of the two given points) = (-6 - 2)/(0 - 4) = -8/-4 = 2 So m = 2 ie the equation of the line becomes: y = 2x + c where c still needs to be determined. The point (0, -6) is on the line. That is, when x = 0, y = -6. Substituting in the equation, -6 = 2*0 + c so that c = -6 and the equation of the line is y = 2x - 6
It is an equation of a straight line.
Plug both points into the equation of a line, y =m*x + b and then solve the system of equations for m and b to get equation of the line through the points.