To find the slope of a line can you choose any two points on the line?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Which equation matches the graph shown ?

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.