1) a) Create an unambiguous grammar which generates basic mathematical expressions (using numbers and the four operators , -, *,
/). Without parentheses, parsing and mathematically evaluating expressions created by this string should give the result you'd get while following the order of operations. For now, you may abstract "number" as a single terminal, n. In the order of operations, * and / should be given precendence over and -. Aside from that, evaluation should occur from left to right. So 8/4*2 would result in 4, not 1. 1 2*3 would be 7. 4 3*5-6/2*4 would be 4 15-6/2*4
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The intercept of a graph is the point where the graph crosses the axes of the graph.
The interpretation of the c-intercept is: <em>in 1996, the global wind power capacity was approximately 7 gigawatts.</em>
On the graph (see attachment), we have the following observations
- The vertical axis represents the global wind power capacity (i.e. the c-axis)
- The horizontal axis represents the years since 1996 (i.e. the t-axis)
So, the c-intercept is the point that crosses the vertical axis.
From the graph, the curve crosses the c-axis at c = 7, and t = 0 (i.e. years = 1996)
Hence, the interpretation of the c-intercept is: <em>in 1996, the global wind power capacity was approximately 7 gigawatts.</em>
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