Is y=4 linear function? why or why not?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

Item 1 use the polygon tool to draw a rectangle with a length of 4 units and a height of 2 units. one of the sides of the rectangle falls on line ef , and the rectangle has a vertex of e. each segment on the grid represents 1 unit.

What is the equation for the line that passes through the points (-6,4) and (-2,9) answer in point slope form