How is the formula to find the slope between any two points the same as rise/run?

Which graph represents 2x-5y< 15

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Which is the product of 58 and 1,000? a. 0.058 b. 5,800 c. 58,000 d. 580,000