How many drops of wide range indicator will you use for each test, based on industry standards such as the lamotte field test?

What is the value of x in the diagram below?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

Ineed ! what is the connection between ratios, fractions, and percents? give an example with your answer.