Can someone help me graph this? Question: Graph this step function on the coordinate grid.

Thanks!​

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Can someone me with these two circle theorem questions asap?

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?