what is the equation of a parabola with its focus at (2, 7) and the y-axis as the directrix. Write the equation in the general form y = ax2 + bx + c.

How do you determine whether a relationship represented as as graph is linear or nonlinear

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?

If rs 900 amounts to rs 1044 in 4 years, what sum will amount to 1368 in 3 1/2 years at the same rate