I buy a MP3 player for £40 in a sale where it was 20% off. What was the original price
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We have the function and we want to find a function that has the same y-intercept than the previous function.
First, let's find the y-intercept by subtituting 0 for 'x'.
Now that we found that y-intercept =-3, any lineal function of the type: will have the same y-intercept. Where 'a' can take all the real values.
Also, any quadratic function of the type: will have the same y-intercept. Where 'a' and 'b' can take all the real values.
Everything about number one is because it's a half of circle so its area = 1/2 ¶r^2 and its perimeter = ¶r
