Ind the equation of a line which pes through point (-2, -7)?

Parallel lines have the same slope. So your new equation is y=5x+b. b is your y intercept. Next substitute -2 for your x and -7 for your y. Now the equation is -7=5(-2)+b. Which turns into -7=-10+b. Add a positive 10 to both sides which gives you. 3=b. Your new equation is y=5x +3.