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Math·Problem-Solving and Data Analysis·Two-variable data: Models and scatterplots

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The function $t$ gives the estimated melting temperature, in degrees Celsius, of a DNA molecule as a function of the percent of guanine-cytosine (GC) content, $x$, in the DNA molecule. The graph of $y=t(x)$ is shown. According to the graph, which of the following statements is NOT true?

A

For each increase of $x$ by $1$, $t(x)$ increases by approximately $\frac{2}{5}$.

B

A DNA molecule with a GC content of $0\%$ has an estimated melting temperature between $60^{\circ }\text{C}$ and $65^{\circ }\text{C}$.

C

A DNA molecule with a GC content of $95\%$ has an estimated melting temperature between $100^{\circ }\text{C}$ and $105^{\circ }\text{C}$.

D

A DNA molecule with a GC content of $98\%$ has an estimated melting temperature between $80^{\circ }\text{C}$ and $90^{\circ }\text{C}$.