<![CDATA[This study aims to determine the understanding of mathematical concepts of students in the material function in Class VIII SMP Negeri Satu Atap Tanjung Balai T.P 2021/2022. This study is a quantitative descriptive research. The population in this study were all students of Class VIII SMP Negeri Satu Atap Tanjung Balai consisting of two classes, namely VIII-1 and VIII-2 as many as 64 people, and the sample in this study was Class VIII-1 as many as 32 people taken by cluster random sampling technique. The instrument used in this study using a test instrument description form. Based on the analysis of data obtained shows that in the interval X > 93 there is 1 person with a percentage of 3% and very high ability category, interval 82 < X < 93 there are 6 people with a percentage of 19% with high ability category, interval 70 < X < 82 there are 18 people with a percentage of 56% with medium ability category, interval 59 < X < 70 there are 5 people with a percentage of 16% with low category, interval X < 59 There are 2 people with a percentage of 6% with very low category. So, the ability of students in understanding the concept of material function Class VIII SMP Negeri Satu Atap Tanjung Balai T.P 2021/2022 belongs to the medium category in the interval 70 < X < 82 as many as 18 people with a percentage of 56%.. ]]>
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