Usually time is on the x-axis but it is made specific here that time is on the y-axis. That being the case, a is the reciprocal of the speed. That is, the time taken to move a unit distance (as measured on the x-axis).
It is a point on the number line, at a distance equal to x, to the left of 90.
If you mean: 2x+4y = 4 then the graph joins the points: (2, 0) and (0, 1)
You move the graph upwards by 2 units.
You may mean, what is the graph of the function y = x^2 + 3. This graph shows a upward parabola with a y-intercept of 3 and a minimum at x=0.
You can do the equation Y 2x plus 3 on a graph. On this graph the Y would equal 5 and X would equal to 0.
If the question is what I think it is, then it means a translation of the graph by 1 unit to the left.
y = -0.5x plus or minus any number
On my graphing calculator, a TI84 Plus, I can enter the equation into the Y= (a button) and then graph it by hitting the Graph button.
It is a straight line with gradient -A/B and intercept C/B.
The object is at some reference point at time b. The object moves at a constant speed (in a radial direction). Its speed is 1/a units of distance per each unit of time. Equivalently, it takes a units of time to move a unit of distance. The formula gives the time taken to get to a distance of x units from the reference point.
There is no graph because there is no equation - only an expression.
Stopping Sight Distance