Given the directrix of y = -1 and focus of (0, 3), which is the equation of the parabola?

Y=1/8x^2-1
Y=-1/8x^2+1
Y=1/8x^2+1
Y=-1/8x^2-1

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4