Define BETA / Level Risk question

4. DEFINE BETA and explain the difference in level Risk (vs, the market portfolio, the proxy used is the S\&P 500 index) for each of the stocks below. Describe the variation in price for each stock that you would expect when the S\&P 500 increases by 5%. - DELL which has a Beta of 1.27 - Kellogs which has a Beta of 43