using while loop to solve a function

Given the following function ?(x) = x^3 − (5?)^2 + 2^x − 10000x Use a while loop to compute f(x) for many evenly spaced values of 0 ≤ x ≤ 20 and create a plot of the results

my solution:

x = linspace(0,20,20);

j = 0;

while (j<=20)

y = x.^3-(5.*x).^2+2.^x-(10000.*x);

j = j+1;

plot(x,y)

end

WHEN I GRAPH ON MY CALCULATOR IT IS JUST A STRAIGHT LINE DOWN NOTHING LIKE MY PLOT. I'T SHOULD BE A STRAIGHT LINE , I GUESS IM JUST WONDERING IF MY SOLUTION AND GRAPH ARE CORRECT

[Stephen23]

Note that your loop is entirely superfluous because you do not change anything inside that loop to change the calculation of y. Basically every loop iteration is discarded except for the last one.

You generate the entire x vector and wrote vectorized code to calculate y, which is a better way to solve this than what your assignment asked for (using a loop):

x = linspace(0,20,20);
y = x.^3-(5.*x).^2+2.^x-(10000.*x);
plot(x,y)